ARCH Specifications_ADDENDUM C 06032026.pdf

12-01-21

ADDENDUM C

00 01 10-1

DEPARTMENT OF VETERANS AFFAIRS

VHA MASTER SPECIFICATIONS

TABLE OF CONTENTS

Section 00 01 10

SECTION NO. DIVISION AND SECTION TITLES DATE

DIVISION 00 - SPECIAL SECTIONS

00 01 15 List of Drawing Sheets 05-20

DIVISION 01 - GENERAL REQUIREMENTS

01 00 00 General Requirements 05-21

01 00 01 Pre-Construction Risk Assessment (PCRA) Form

01 00 02 ILSM Evaluation Form

01 32 16.15 Project Schedules (Small Projects – Design/Bid/Build 03-20

01 33 23 Shop Drawings, Product Data, and Samples 06-21

01 35 26 Safety Requirements 07-20

01 42 19 Reference Standards 11-20

01 45 00 Quality Control 02-21

01 45 29 Testing Laboratory Services 11-18

01 45 35 Special Inspections 06-21

01 57 19 Temporary Environmental Controls 01-21

01 74 19 Construction Waste Management 01-21

01 81 13 Sustainable Construction Requirements 10-17

01 91 00 General Commissioning Requirements 10-15

DIVISION 02 – EXISTING CONDITIONS

02 21 13 Site Surveys 01-21

02 41 00 Demolition 08-17

02 65 00 Underground Storage Tank Removal 01-21

DIVISION 03 – CONCRETE

03 30 00 Cast-in-Place Concrete 01-21

DIVISION 04 – MASONRY

04 05 13 Masonry Mortaring 10-17

04 20 00 Unit Masonry 08-17

DIVISION 05 – METALS

05 12 00 Structural Steel Framing 11-18

05 21 00 Steel Joist Framing 11-18

05 40 00 Cold-Formed Metal Framing 01-21

00 01 10-2

SECTION NO. DIVISION AND SECTION TITLES DATE

05 50 00 Metal Fabrications 08-18

ADD C

05 51 00 Metal Stairs 01-21

DIVISION 06 – WOOD, PLASTICS AND COMPOSITES

06 10 00 Rough Carpentry 10-17

06 20 00 Finish Carpentry 01-21

DIVISION 07 – THERMAL AND MOISTURE PROTECTION

07 01 50.19 Preparation for Re-Roofing 01-21

07 13 00 Sheet Waterproofing 01-21

ADD C

07 21 13 Thermal Insulation 01-21

07 22 00 Roof and Deck Insulation 01-21

07 27 00 Self-adhered Sheet Air Barriers and Water-resistive

Barrier

CUSTOM

ADD C

07 40 00 Roofing and Siding Panels - Standing Seam 01-21

ADD C

07 71 00 Roof Specialties 01-21

ADD C

07 84 00 Firestopping 01-21

07 92 00 Joint Sealants 10-17

07 95 13 Expansion Joint Cover Assemblies 01-21

DIVISION 08 - OPENINGS

08 90 00 Louvers and Vents 01-21

DIVISION 09 – FINISHES

09 22 16 Non-Structural Metal Framing 06-18

09 29 00 Gypsum Board 04-20

09 91 00 Painting 01-21

DIVISION 10 – SPECIALTIES

10 26 00 Wall and Door Protection 01-21

DIVISION 11 – EQUIPMENT (NOT USED)

DIVISION 12 – FURNISHINGS

12 32 00 Manufactured Wood Casework 01-21

12 36 00 Countertops 12-23

00 01 10-3

SECTION NO. DIVISION AND SECTION TITLES DATE

DIVISION 13 - SPECIAL CONSTRUCTION (NOT USED)

DIVISION 14– CONVEYING EQUIPEMENT (NOT USED)

DIVISION 21- FIRE SUPPRESSION

21 13 13 Wet-Pipe Sprinkler Systems 06-15

DIVISION 22 – PLUMBING

22 05 11 Common Work Results for Plumbing 09-20

22 05 23 General-Duty Valves for Plumbing Piping 09-20

22 07 11 Plumbing Insulation 09-19

22 11 00 Facility Water Distribution 05-21

22 13 00 Facility Sanitary and Vent Piping 09-20

22 14 29 Sump Pumps 09-15

22 40 00 Plumbing Fixtures 09-15

DIVISION 23 – HEATING, VENTILATING, AND AIR

CONDITIONING (HVAC)

23 05 10 Common Work Results for Boiler Plant and Steam

Generation

04-20

23 05 12 General Motor Requirements for HVAC and Steam

Generation Equipment

02-20

23 05 51 Noise and Vibration Control for Boiler Plant 04-20

23 05 93 Testing, Adjusting, and Balancing for HVAC 02-20

23 07 11 HVAC and Boiler Plant Insulation 02-20

23 08 00 Commissioning of HVAC Systems 02-20

23 08 11 Demonstrations and Tests for Boiler Plant 04-20

23 09 11 Instrumentation and Control for Boiler Plant 08-21

23 09 23 Direct-Digital Control System for HVAC 09-11

23 10 00 Facility Fuel Systems 04-20

23 21 11 Boiler Plant Piping Systems 09-21 23 34 00 HVAC Fans 02-20

23 50 11 Boiler Plant Mechanical Equipment 11-17 23 51 00 Breechings, Chimneys, and Stacks 04-20 23 52 39 Fire-Tube Boilers 08-21

23 82 00 Convection Heating and Cooling Units 03-20

23 82 16 Air Coils 03-20

DIVISION 25 – INTEGRATED AUTOMATION (NOT USED)

DIVISION 26 – ELECTRICAL

26 05 11 Requirements for Electrical Installations 01-16

26 05 19 Low-Voltage Electrical Power Conductors and Cables 01-17

00 01 10-4

SECTION NO. DIVISION AND SECTION TITLES DATE

26 05 26 Grounding and Bonding for Electrical Systems 01-17

26 05 33 Raceway and Boxes for Electrical Systems 01-18

26 05 41 Underground Electrical Construction 01-17

26 05 73 Overcurrent Protective Device Coordination Study 01-18

26 08 00 Commissioning of Electrical Systems 11-16

26 24 13 Distribution Switchboards 01-18

26 24 16 Panelboards 01-18

26 24 19 Motor Control Centers 01-18

26 27 26 Wiring Devices 01-18

26 29 11 Motor Controllers 01-18

26 29 21 Enclosed Switches and Circuit Breakers 01-17

26 33 53 Static Uninterruptible Power Supply 01-17

26 43 13 Surge Protective Devices 01-17

26 51 00 Interior Lighting 01-18

DIVISION 27 – COMMUNICATIONS (NOT USED)

DIVISION 28 – ELECTRONIC SAFETY AND SECURITY (NOT USED)

DIVISION 31 – EARTHWORK

31 20 00 Earthwork 07-16

DIVISION 32 – EXTERIOR IMPROVEMENTS

32 05 23 Cement and Concrete for Exterior Improvements 08-16

32 12 16 Asphalt Paving 09-15

32 17 23 Pavement Markings 08-16

DIVISION 33 – UTILITIES

33 08 00 Commissioning of Site Utility Systems 11-16

33 10 00 Water Utilities 03-17

33 30 00 Sanitary Sewer Utilities 06-13

DIVISION 34 – TRANSPORTATION (NOT USED)

DIVISION 48 – Electrical Power Generation (NOT USED)

SUPPLEMENTAL SPECIFICATIONS - THE CITY OF DURHAM ADD C

31 05 13 Soils for Earthwork

The City of Durham, Public Works Department

CUSTOM

31 05 16 Aggregates for Earthwork

The City of Durham, Public Works Department

CUSTOM

31 23 16 Excavation - Earthwork

CUSTOM

00 01 10-5

SECTION NO. DIVISION AND SECTION TITLES DATE

31 23 17 Trenching, Backfilling & Compaction of Utilities

The City of Durham, Public Works Department

CUSTOM

31 23 18 Rock Removal

The City of Durham, Public Works Department

CUSTOM

33 01 31 Manhole Grade Adjustment

The City of Durham, Public Works Department

CUSTOM

33 01 32 Sewer and Manhole Testing

The City of Durham, Public Works Department

CUSTOM

33 05 14 Public Manholes and Structures

The City of Durham, Public Works Department

CUSTOM

33 05 16 Utility Structures

The City of Durham, Public Works Department

CUSTOM

33 05 17 Precast Concrete Valve Vaults and Meter Boxes

The City of Durham, Public Works Department

CUSTOM

33 11 13 Public Water Utility Distribution - Piping

The City of Durham, Public Works Department

CUSTOM

33 12 13 Public Water Utility Distribution - Water Service

Connections

The City of Durham, Public Works Department

CUSTOM

33 12 16 Water Utility Distribution Valves the City of Durham, Public Works Department

CUSTOM

33 12 19 Water Utility Distribution Fire Hydrants

The City of Durham, Public Works Department

CUSTOM

33 13 00 Disinfecting of Water Utility Distribution

The City of Durham, Public Works Department

CUSTOM

33 31 13 Public Sanitary Utility Sewerage Piping

The City of Durham, Public Works Department

CUSTOM

33 34 00 Sanitary Utility Sewerage Force Main

- - - E N D - - -

08-01-18

05 50 00- 1

SECTION 05 50 00

METAL FABRICATIONS

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies items and assemblies fabricated from structural steel shapes and other materials as shown and specified.

B. Items specified.

1. Support for Wall and Ceiling Mounted Items: (SD055000-02)

2. Frames

3. Guards

4. Covers and Frames for Pits and Trenches

5. Gratings

6. Loose Lintels

7. Shelf Angles

8. Gas Racks

9. Plate Door Sill

10. Safety Nosings

11. Ladders

12. Railings:

13. Catwalks and Platforms

14. Trap Doors with Ceiling Hatch

15. Sidewalk Access Doors

16. Screened Access Doors

17. Steel Counter or Bench Top Frame and Leg

18. Steel Pipe Bollards

19. Loose bearing and leveling plates for applications where they are not specified in other Sections.

20. Façade prefabricated galvanized steel tube frames for woven mesh or perforated aluminum screen panels

21. Formed plate Vehicular Barriers

22. Garage head clearance bars

23. Safety Tie-back roof pedestals and anchors for maintenance staff.

1.2 RELATED WORK

A. Section 05 51 00, METAL STAIRS: Railings attached to steel stairs.

B. Section 09 91 00, PAINTING: Prime and finish painting.

05 50 00- 2

C. Section 10 26 00, WALL AND DOOR PROTECTION: Stainless steel corner guards.

1.3 SUBMITTALS

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT

DATA, AND SAMPLES.

B. Manufacturer's Literature and Data:

Grating, each type Floor plate

Trap door Wheel guards

Ceiling hatch Sidewalk Access door

Manhole Covers Safety nosing

C. Shop Drawings:

1. Each item specified, showing complete detail, location in the project, material and size of components, method of joining various components and assemblies, finish, and location, size and type of anchors.

2. Mark items requiring field assembly for erection identification and furnish erection drawings and instructions.

3. Provide templates and rough-in measurements as required.

D. Manufacturer's Certificates:

1. Anodized finish as specified.

2. Live load designs as specified.

E. Design Calculations for specified live loads including dead loads.

F. Furnish setting drawings and instructions for installation of anchors to be preset into concrete and masonry work, and for the positioning of items having anchors to be built into concrete or masonry construction.

1.4 QUALITY ASSURANCE

A. Each manufactured product shall meet, as a minimum, the requirements specified, and shall be a standard commercial product of a manufacturer regularly presently manufacturing items of type specified.

B. Each product type shall be the same and be made by the same manufacturer.

C. Assembled product to the greatest extent possible before delivery to the site.

05 50 00- 3

D. Include additional features, which are not specifically prohibited by this specification, but which are a part of the manufacturer's standard commercial product.

1.5 APPLICABLE PUBLICATIONS

A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only.

B. American Society of Mechanical Engineers (ASME):

B18.6.1-97..............Wood Screws

B18.2.2-87(R2010).......Square and Hex Nuts

C. American Society for Testing and Materials (ASTM):

A36/A36M-14.............Structural Steel

A47-99(R2014)...........Malleable Iron Castings

A48-03(R2012)...........Gray Iron Castings

A53-12..................Pipe, Steel, Black and Hot-Dipped, Zinc-Coated

Welded and Seamless

A123-15.................Zinc (Hot-Dip Galvanized) Coatings on Iron and

Steel Products

A240/A240M-15...........Standard Specification for Chromium and

Chromium-Nickel Stainless Steel Plate, Sheet and Strip for Pressure Vessels and for General

Applications.

A269-15.................Seamless and Welded Austenitic Stainless Steel

Tubing for General Service

A307-14.................Carbon Steel Bolts and Studs, 60,000 PSI

Tensile Strength

A391/A391M-07(R2015)....Grade 80 Alloy Steel Chain

A786/A786M-15...........Rolled Steel Floor Plate

B221-14.................Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Shapes, and Tubes

B456-11.................Electrodeposited Coatings of Copper Plus Nickel

Plus Chromium and Nickel Plus Chromium

B632-08.................Aluminum-Alloy Rolled Tread Plate

C1107-13................Packaged Dry, Hydraulic-Cement Grout

(Nonshrink)

05 50 00- 4

D3656-13................Insect Screening and Louver Cloth Woven from

Vinyl-Coated Glass Yarns

F436-16.................Hardened Steel Washers

F468-06(R2015)..........Nonferrous Bolts, Hex Cap Screws, Socket Head

Cap Screws and Studs for General Use

F593-13.................Stainless Steel Bolts, Hex Cap Screws, and

Studs

F1667-15................Driven Fasteners: Nails, Spikes and Staples

D. American Welding Society (AWS):

D1.1-15.................Structural Welding Code Steel

D1.2-14.................Structural Welding Code Aluminum

D1.3-18.................Structural Welding Code Sheet Steel

E. National Association of Architectural Metal Manufacturers (NAAMM)

AMP 521-01(R2012).......Pipe Railing Manual

AMP 500-06..............Metal Finishes Manual

MBG 531-09(R2017).......Metal Bar Grating Manual

MBG 532-09..............Heavy Duty Metal Bar Grating Manual

F. Structural Steel Painting Council (SSPC)/Society of Protective

Coatings:

SP 1-15.................No. 1, Solvent Cleaning

SP 2-04.................No. 2, Hand Tool Cleaning

SP 3-04.................No. 3, Power Tool Cleaning

G. Federal Specifications (Fed. Spec):

RR-T-650E...............Treads, Metallic and Nonmetallic, Nonskid

PART 2 - PRODUCTS

2.1 DESIGN CRITERIA

A. In addition to the dead loads, design fabrications to support the following live loads unless otherwise specified.

B. Ladders and Rungs: 120 kg (250 pounds) at any point.

C. Railings and Handrails: 900 N (200 pounds) in any direction at any point.

D. Floor Plates, Gratings, Covers, Trap Doors, Catwalks, and Platforms:

500 kg/m2 (100 pounds per square foot). Use 2,500 kg (500 pounds) for concentrated loads. Use 25,000 kg/m2 (5,000 pounds per square foot) for vehicle loads in the following areas indicated on Drawings.

E. Manhole Covers: 1200 kg/m2 (250 pounds per square foot).

05 50 00- 5

2.2 MATERIALS

A. Structural Steel: ASTM A36.

B. Stainless Steel: ASTM A240, Type 302 or 304.

C. Aluminum, Extruded: ASTM B221, Alloy 6063-T5 unless otherwise specified. For structural shapes use alloy 6061-T6 and alloy 6061-

T4511.

D. Floor Plate:

1. Steel ASTM A786.

2. Aluminum: ASTM B632.

E. Steel Pipe (Bollard): ASTM A53.

1. Galvanized for exterior locations.

2. Type S, Grade A unless specified otherwise.

3. NPS (inside diameter) as shown.

F. Cast-Iron: ASTM A48, Class 30, commercial pattern.

G. Malleable Iron Castings: A47.

H. Primer Paint: As specified in Section 09 91 00, PAINTING.

I. Stainless Steel Tubing: ASTM A269, type 302 or 304.

J. Modular Channel Units:

1. Factory fabricated, channel shaped, cold formed sheet steel shapes, complete with fittings bolts and nuts required for assembly.

2. Form channel within turned pyramid shaped clamping ridges on each side.

3. Provide case hardened steel nuts with serrated grooves in the top edges designed to be inserted in the channel at any point and be given a quarter turn so as to engage the channel clamping ridges.

Provide each nut with a spring designed to hold the nut in place.

4. Factory finish channels and parts with oven baked primer when exposed to view. Channels fabricated of ASTM A525, G90 galvanized steel may have primer omitted in concealed locations. Finish screws and nuts with zinc coating.

5. Fabricate snap-in closure plates to fit and close exposed channel openings of not more than 0.3 mm (0.0125 inch) thick stainless steel.

K. Grout: ASTM C1107, pourable type.

L. Insect Screening: ASTM D3656.

05 50 00- 6

2.3 HARDWARE

A. Rough Hardware:

1. Furnish rough hardware with a standard plating, applied after punching, forming and assembly of parts; galvanized, cadmium plated, or zinc-coated by electro-galvanizing process. Galvanized G-90 where specified.

2. Use G90 galvanized coating on ferrous metal for exterior work unless non-ferrous metal or stainless is used.

B. Fasteners:

1. Bolts with Nuts:

a. ASME B18.2.2.

b. ASTM A307 for 415 MPa (60,000 psi) tensile strength bolts.

c. ASTM F468 for nonferrous bolts.

d. ASTM F593 for stainless steel.

2. Screws: ASME B18.6.1.

3. Washers: ASTM F436, type to suit material and anchorage.

4. Nails: ASTM F1667, Type I, style 6 or 14 for finish work.

2.4 FABRICATION GENERAL

A. Material

1. Use material as specified. Use material of commercial quality and suitable for intended purpose for material that is not named or its standard of quality not specified.

2. Use material free of defects which could affect the appearance or service ability of the finished product.

B. Size:

1. Size and thickness of members as shown.

2. When size and thickness is not specified or shown for an individual part, use size and thickness not less than that used for the same component on similar standard commercial items or in accordance with established shop methods.

C. Connections

1. Except as otherwise specified, connections may be made by welding, riveting or bolting.

2. Field riveting will not be approved.

3. Design size, number and placement of fasteners, to develop a joint strength of not less than the design value.

05 50 00- 7

4. Holes, for rivets and bolts: Accurately punched or drilled and burrs removed.

5. Size and shape welds to develop the full design strength of the parts connected by welds and to transmit imposed stresses without permanent deformation or failure when subject to service loadings.

6. Use Rivets and bolts of material selected to prevent corrosion

(electrolysis) at bimetallic contacts. Plated or coated material will not be approved.

7. Use stainless steel connectors for removable members machine screws or bolts.

D. Fasteners and Anchors

1. Use methods for fastening or anchoring metal fabrications to building construction as shown or specified.

2. Where fasteners and anchors are not shown, design the type, size, location and spacing to resist the loads imposed without deformation of the members or causing failure of the anchor or fastener, and suit the sequence of installation.

3. Use material and finish of the fasteners compatible with the kinds of materials which are fastened together and their location in the finished work.

4. Fasteners for securing metal fabrications to new construction only, may be by use of threaded or wedge type inserts or by anchors for welding to the metal fabrication for installation before the concrete is placed or as masonry is laid.

5. Fasteners for securing metal fabrication to existing construction or new construction may be expansion bolts, toggle bolts, power actuated drive pins, welding, self drilling and tapping screws or bolts.

E. Workmanship

1. General:

a. Fabricate items to design shown.

b. Furnish members in longest lengths commercially available within the limits shown and specified.

c. Fabricate straight, true, free from warp and twist, and where applicable square and in same plane.

05 50 00- 8

d. Provide holes, sinkages and reinforcement shown and required for fasteners and anchorage items.

e. Provide openings, cut-outs, and tapped holes for attachment and clearances required for work of other trades.

f. Prepare members for the installation and fitting of hardware.

g. Cut openings in gratings and floor plates for the passage of ducts, sumps, pipes, conduits and similar items. Provide reinforcement to support cut edges.

h. Fabricate surfaces and edges free from sharp edges, burrs and projections which may cause injury.

2. Welding:

a. Weld in accordance with AWS.

b. Welds shall show good fusion, be free from cracks and porosity and accomplish secure and rigid joints in proper alignment.

c. Where exposed in the finished work, continuous weld for the full length of the members joined and have depressed areas filled and protruding welds finished smooth and flush with adjacent surfaces.

d. Finish welded joints to match finish of adjacent surface.

3. Joining:

a. Miter or butt members at corners.

b. Where frames members are butted at corners, cut leg of frame member perpendicular to surface, as required for clearance.

4. Anchors:

a. Where metal fabrications are shown to be preset in concrete, weld

32 x 3 mm (1-1/4 by 1/8 inch) steel strap anchors, 150 mm (6 inches) long with 25 mm (one inch) hooked end, to back of member at 600 mm (2 feet) on center, unless otherwise shown.

b. Where metal fabrications are shown to be built into masonry use

32 x 3 mm (1-1/4 by 1/8 inch) steel strap anchors, 250 mm (10 inches) long with 50 mm (2 inch) hooked end, welded to back of member at 600 mm (2 feet) on center, unless otherwise shown.

5. Cutting and Fitting:

a. Accurately cut, machine and fit joints, corners, copes, and miters.

b. Fit removable members to be easily removed.

05 50 00- 9

c. Design and construct field connections in the most practical place for appearance and ease of installation.

d. Fit pieces together as required.

e. Fabricate connections for ease of assembly and disassembly without use of special tools.

f. Joints firm when assembled.

g. Conceal joining, fitting and welding on exposed work as far as practical.

h. Do not show rivets and screws prominently on the exposed face.

i. The fit of components and the alignment of holes shall eliminate the need to modify component or to use exceptional force in the assembly of item and eliminate the need to use other than common tools.

F. Finish:

1. Finish exposed surfaces in accordance with NAAMM AMP 500 Metal

Finishes Manual.

2. Aluminum: NAAMM AMP 501.

a. Mill finish, AA-M10, as fabricated, use unless specified otherwise.

b. Clear anodic coating, AA-C22A41, chemically etched medium matte, with Architectural Class 1, 0.7 mils or thicker.

c. Colored anodic coating, AA-C22A42, chemically etched medium matte with Architectural Class 1, 0.7 mils or thicker.

d. Painted: AA-C22R10.

3. Steel and Iron: NAAMM AMP 504.

a. Zinc coated (Galvanized): ASTM A123, G90 unless noted otherwise.

b. Surfaces exposed in the finished work:

1) Finish smooth rough surfaces and remove projections.

2) Fill holes, dents and similar voids and depressions with epoxy type patching compound.

c. Shop Prime Painting:

1) Surfaces of Ferrous metal:

a) Items not specified to have other coatings.

b) Galvanized surfaces specified to have prime paint.

c) Remove all loose mill scale, rust, and paint, by hand or power tool cleaning as defined in SSPC-SP2 and SP3.

05 50 00- 10

d) Clean of oil, grease, soil and other detrimental matter by use of solvents or cleaning compounds as defined in SSPC-

SP1.

e) After cleaning and finishing apply one coat of primer as specified in Section 09 91 00, PAINTING.

2) Non ferrous metals: Comply with MAAMM-500 series.

4. Stainless Steel: NAAMM AMP-504 Finish No. 4.

5. Chromium Plating: ASTM B456, satin or bright as specified, Service

Condition No. SC2.

G. Protection:

1. Insulate aluminum surfaces that will come in contact with concrete, masonry, plaster, or metals other than stainless steel, zinc or white bronze by giving a coat of heavy-bodied alkali resisting bituminous paint or other approved paint in shop.

2. Spot prime all abraded and damaged areas of zinc coating which expose the bare metal, using zinc rich paint on hot-dip zinc coat items and zinc dust primer on all other zinc coated items.

2.5 SUPPORTS

A. General:

1. Fabricate ASTM A36 structural steel shapes as shown.

2. Use clip angles or make provisions for welding hangers and braces to overhead construction.

3. Field connections may be welded or bolted.

B. For Wall Mounted Items:

1. For items supported by metal stud partitions.

2. Steel strip or hat channel minimum of 1.5 mm (0.0598 inch) thick.

3. Steel strip minimum of 150 mm (6 inches) wide, length extending one stud space beyond end of item supported.

4. Steel hat channels where shown. Flange cut and flatted for anchorage to stud.

5. Structural steel tube or channel for grab bar at water closets floor to structure above with clip angles or end plates formed for anchors.

6. Use steel angles for thru wall counters. Drill angle for fasteners at ends and not over 100 mm (4 inches) on center between ends.

05 50 00- 11

2.6 FRAMES

A. Frames for Breech Opening:

1. Fabricate from steel channels, or combination of steel plates and angles to size and contour shown.

2. Weld strap anchors on back of frame at not over 600 mm (2 feet) on centers for concrete or masonry openings.

2.7 GUARDS

A. Wall Corner Guards:

1. Fabricate from steel angles and furnish with anchors as shown.

2. Continuously weld anchor to angle.

B. Guard Angles for Overhead Doors:

1. Cut away top portion of outstanding leg of angle and extend remaining portion of angle up wall.

2. Weld filler piece across head of opening to jamb angles.

3. Make provisions for fasteners and anchorage.

C. Edge Guard Angles for Openings in slabs.

1. Fabricate from steel angles of sizes and with anchorage shown.

2. Where size of angle is not shown, provide 50 x 50 x 6 mm (2 x 2 x

1/4 inch) steel angle with 32 x 5 mm (1-1/4 x 3/16 inch) strap anchors, welded to back.

3. Miter or butt angles at corners and weld.

4. Use one anchor near end and three feet on centers between end anchors.

2.8 COVERS AND FRAMES FOR PITS AND TRENCHES

A. Fabricate covers to support live loads specified.

B. Galvanized steel members after fabrication in accordance with ASTM

A123, G-90 coating.

C. Steel Covers:

1. Use 6 mm (1/4 inch) thick floor plate for covers unless otherwise shown. Use gratings where shown as specified in paragraph GRATINGS.

Use smooth floor plate unless noted otherwise.

2. Provide clearance at all sides to permit easy removal of covers.

3. Make cutouts within 6 mm (1/4 inch) of penetration for passage of pipes and ducts.

4. Drill covers for flat head countersunk screws.

05 50 00- 12

5. Make cover sections not to exceed 2.3 m2 (25 square feet) in area and

90 kg (200 pounds) in weight.

6. Fabricate trench cover sections not be over 900 mm (3 feet) long and if width of trench is more than 900 mm (3 feet)or over, equip one end of each section with an angle or "T" bar stiffener to support adjoining plate.

7. Use two, 13 mm (1/2 inch) diameter steel bar flush drop handles for each cover section.

D. Cast Iron Covers

1. Fabricate covers to support live loads specified.

2. Fabricate from ASTM A48, cast-iron, 13 mm (1/2 inch) minimum metal thickness, cast with stiffeners as required.

3. Fabricate as flush type with frame, reasonably watertight and be equipped with flush type lifting rings. Provide seals where watertight covers noted.

4. Make covers in sections not over 90 kg (200 pounds) except round covers.

E. Steel Frames:

1. Form frame from structural steel angles as shown. Where not shown use 63 x 63 x 6 mm (2-1/2 x 2-1/2 x 1/4 inch) angles for frame openings over 1200 mm (4 feet) long and 50 x 50 x 6 mm (2 ix 2 x 1/4 inch) for frame openings less than 1200 mm (4 feet).

2. Fabricate intermediate supporting members from steel "T's" or angles; located to support cover section edges.

3. Where covers are required use steel border bars at frames so that top of cover will be flush with frame and finish floor.

4. Weld steel strap anchors to frame. Space straps not over 600 mm (24 inches) o.c., not shown otherwise between end anchors. Use 6 x 25 x

200 mm (1/4 x 1 x 8 inches) with 50 mm (2 inch) bent ends strap anchors unless shown otherwise.

5. Drill and tap frames for screw anchors where plate covers occur.

F. Cast Iron Frames:

1. Fabricate from ASTM A48 cast iron to shape shown.

2. Provide anchors for embedding in concrete, spaced near ends and not over 600 mm (24 inches) apart.

05 50 00- 13

2.9 GRATINGS

A. Fabricate gratings to support live loads specified and a concentrated load as specified.

B. Provide clearance at all sides to permit easy removal of grating.

C. Make cutouts in gratings with 6 mm (1/4 inch) minimum to 25 mm (one inch) maximum clearance for penetrations or passage of pipes and ducts.

Edge band cutouts.

D. Fabricate in sections not to exceed 2.3 m2 (25 square feet) in area and

90 kg (200 pounds) in weight.

E. Fabricate sections of grating with end-banding bars.

F. Fabricate angle frames and supports, including anchorage as shown.

1. Fabricate intermediate supporting members from "T's" or angles.

2. Locate intermediate supports to support grating section edges.

3. Fabricate frame to finish flush with top of grating.

4. Locate anchors at ends and not over 600 mm (24 inches) o.c.

5. Butt or miter, and weld angle frame at corners.

G. Steel Bar Gratings:

1. Fabricate grating using steel bars, frames, supports and other members shown in accordance with Metal Bar Grating Manual.

2. Galvanize steel members after fabrication in accordance with ASTM

A123, G-90 for exterior gratings, gratings in concrete floors, and interior grating where specified.

3. Interior gratings: Prime paint unless specified galvanized.

H. Aluminum Bar Gratings:

1. Fabricate grating and frame assembly from aluminum as shown in accordance with Metal Bar Grating Manual.

2. Use 25 x 5 mm (1 x 3/16 inch) minimum size bearing bars.

3. Mill finish unless specified otherwise.

I. Plank Gratings:

1. Conform to Fed. Spec. RR-G-1602.

2. Manufacturers standard widths, lengths and side channels to meet live load requirements.

3. Galvanize exterior steel gratings ASTM A123, G-90 after fabrication.

4. Fabricate interior steel gratings from galvanized steel sheet, ASTM

A525, where bearing on concrete or masonry.

05 50 00- 14

5. Fabricate other interior grating from steel sheet and finish with shop prime paint. Prime painted galvanized sheet may be used.

J. Cast Iron Gratings:

1. Fabricate gratings to support a live load of 23940 Pa (500 pounds per square foot).

2. Fabricate gratings and frames for gutter type drains from cast-iron conforming to ASTM A48.

3. Fabricate gratings in section not longer than 1200 mm (4 feet) or over 90 kg (200 pounds) and fit so as to be readily removable.

2.10 LOOSE LINTELS

A. Furnish lintels of sizes shown. Where size of lintels is not shown, provide the sizes specified.

B. Fabricate lintels with not less than 150 mm (6 inch) bearing at each end for nonbearing masonry walls, and 200 mm (8 inch) bearing at each end for bearing walls.

C. Provide one angle lintel for each 100 mm (4 inches) of masonry thickness as follows except as otherwise specified or shown.

1. Openings 750 mm to 1800 mm (2-1/2 feet to 6 feet) - 100 x 90 x 8 mm

(4 x 3-1/2 x 5/16 inch).

2. Openings 1800 mm to 3000 mm (6 feet to 10 feet) - 150 x 90 x 9 mm (6 x 3-1/2 x 3/8 inch).

D. For 150 mm (6 inch) thick masonry openings 750 mm to 3000 mm (2-1/2 feet to 10 feet) use one angle 150 x 90 x 9 mm (6 x 3-1/2 x 3/8 inch).

E. Provide bearing plates for lintels where shown.

F. Weld or bolt upstanding legs of double angle lintels together with 19 mm (3/4 inch bolts) spaced at 300 mm (12 inches) on centers.

G. Insert spreaders at bolt points to separate the angles for insertion of metal windows, louver, and other anchorage.

H. Where shown or specified, punch upstanding legs of single lintels to suit size and spacing of anchor bolts.

2.11 SHELF ANGLES

A. Fabricate from steel angles of size shown.

B. Fabricate angles with horizontal slotted holes for 19 mm (3/4 inch) bolts spaced at not over 900 mm (3 feet) on centers and within 300 mm

(12 inches) of ends.

05 50 00- 15

C. Provide adjustable malleable iron inserts for embedded in concrete framing.

2.12 PLATE DOOR SILL

A. Fabricate of checkered plate as detailed.

1. Aluminum Plate: ASTM B632, 3 mm (0.125 inch) thick.

2. Steel Plate: ASTM A786, 3 mm (0.125 inch thick), galvanized G90.

B. Fabricate for anchorage with flat head countersunk bolts at each end and not over 300 mm (12 inches), o.c.

2.13 SAFETY NOSINGS

A. Fed. Spec. RR-T-650, Type C.

1. Aluminum: Class 2, Style 2.

2. Cast iron: Class 4.

B. Fabricate nosings for exterior use from cast aluminum, and nosings for interior use from either cast aluminum or cast iron. Use one Class throughout.

C. Fabricate nosings approximately 100 mm (4 inches) wide with not more than 9 mm (3/8 inch) nose.

D. Provide nosings with integral type anchors spaced not more than 100 mm

(4 inches) from each end and intermediate anchors spaced approximately

375 mm (15 inches) on center.

E. Fabricate nosings to extend within 100 mm (4 inches) of ends of concrete stair treads except where shown to extend full width.

F. Fabricate nosings to extend full width between stringers of metal stairs and full width of door openings.

G. On curved steps fabricate to terminate at point of curvature of steps having short radius curved ends.

2.14 LADDERS

A. Steel Ladders:

1. Fixed-rail type with steel rungs shouldered and headed into and welded to rails.

2. Fabricate angle brackets of 50 mm (2 inch) wide by 13 mm (1/2 inch) thick steel; brackets spaced maximum of 1200 mm (4 feet) apart and of length to hold ladder 175 mm (7 inches) from wall to center of rungs. Provide turned ends or clips for anchoring.

3. Provide holes for anchoring with expansion bolts through turned ends and brackets.

05 50 00- 16

4. Where shown, fabricate side rails curved, twisted and formed into a gooseneck.

5. Galvanize exterior ladders after fabrication, ASTM A123, G-90.

B. Aluminum Ladders:

1. Fixed-rail type, constructed of structural aluminum, with mill finish.

2. Fabricate side rails and rungs of size and design shown, with the rungs shouldered and headed into and welded to the rails.

3. Where shown fabrication side rails curved, twisted and formed into gooseneck.

4. Fabricate angle brackets at top and bottom and intermediate brackets where shown. Drill for bolting.

C. Ladder Rungs:

1. Fabricate from 25 mm (one inch) diameter steel bars.

2. Fabricate so that rungs will extend at least 100 mm (4 inches) into wall with ends turned 50 mm (2 inches), project out from wall 175 mm

(7 inches), be 400 mm (16 inches) wide and be designed so that foot cannot slide off end.

3. Galvanized after fabrication, ASTM A123, G-90 rungs for exterior use and for access to pits.

D. Metal Ships' Ladders and Pipe Crossovers

1. Provide metal ships' ladders and pipe crossovers where indicated.

Fabricate of open-type construction with channel or plate stringers and pipe and tube railings unless otherwise indicated. Provide brackets and fittings for installation.

a. Treads shall be not less than 5 inches (127 mm) exclusive of nosing or less than 8-1/2 inches (216 mm) including the nosing, and riser height shall be not more than 9-1/2 inches (241 mm).

b. Fabricate ships' ladders and pipe crossovers, including railings from steel.

c. Fabricate treads and platforms from welded or pressure-locked steel bar grating. Limit openings in gratings to no more than 3/4 inch (19 mm) in least dimension.

d. Fabricate treads and platforms from rolled-steel floor plate.

e. Comply with applicable railing requirements in Section 055213

"Pipe and Tube Railings."

05 50 00- 17

2. Galvanize exterior steel ships' ladders and pipe crossovers, including treads, railings, brackets, and fasteners.

3. Prime interior steel ships' ladders and pipe crossovers, including treads, railings, brackets, and fasteners, with zinc-rich primer

E. Alternating Tread Devices: Fabricate alternating tread devices of open-type construction with channel or plate stringers and pipe and tube railings unless otherwise indicated. Provide brackets and fittings for installation.

1. Fabricate from steel and assemble by welding or with stainless steel fasteners.

2. Comply with applicable railing requirements in Section 055213 "Pipe and Tube Railings."

3. Non-Egress Alternating Tread Devices: Tread depth shall be not less than 5 inches (127 mm) exclusive of nosing or less than 8-1/2 inches

(216 mm) including the nosing, tread width shall be not less than 7 inches (178 mm), and riser height shall be not more than 9-1/2 inches (241 mm).

4. Egress Alternating Tread Devices: Tread depth shall be not less than

8-1/2 inches (216 mm) exclusive of nosing or less than 10-1/2 inches

(267 mm) including the nosing, tread width shall be not less than 7 inches (178 mm), and riser height shall be not more than 8 inches

(203 mm).

5. Prime steel alternating tread devices, including treads, railings, brackets, and fasteners, with zinc-rich primer.

2.15 RAILINGS

A. In addition to the dead load design railing assembly to support live load specified.

B. Fabrication General:

1. Provide continuous welded joints, dressed smooth and flush.

2. Standard flush fittings, designed to be welded, may be used.

3. Exposed threads will not be approved.

4. Form handrail brackets to size and design shown.

5. Exterior Post Anchors.

a. Fabricate tube or pipe sleeves with closed ends or plates as shown.

05 50 00- 18

b. Where inserts interfere with reinforcing bars, provide flanged fittings welded or threaded to posts for securing to concrete with expansion bolts.

c. Provide heavy pattern sliding flange base plate with set screws at base of pipe or tube posts.

6. Interior Post Anchors:

a. Provide flanged fittings for securing fixed posts to floor with expansion bolts, unless shown otherwise.

b. Weld or thread flanged fitting to posts at base.

c. For securing removable posts to floor, provide close fitting sleeve insert or inverted flange base plate with stud bolts or rivets concrete anchor welded to the base plate.

d. Provide sliding flange base plate on posts secured with set screws.

e. Weld flange base plate to removable posts set in sleeves.

C. Handrails:

1. Close free ends of rail with flush metal caps welded in place except where flanges for securing to walls with bolts are shown.

2. Make provisions for attaching handrail brackets to wall, posts, and handrail as shown.

D. Steel Pipe Railings:

1. Fabricate of steel pipe with welded joints.

2. Number and space of rails as shown.

3. Space posts for railings not over 1800 mm (6 feet) on centers between end posts.

4. Form handrail brackets from malleable iron.

5. Fabricate removable sections with posts at end of section.

6. Removable Rails:

a. Provide "U" shape brackets at each end to hold removable rail as shown. Use for top and bottom horizontal rail when rails are joined together with vertical members.

b. Secure rail to brackets with 9 mm (3/8 inch) stainless steel through bolts and nuts at top rail only when rails joined with vertical members.

c. Continuously weld brackets to post.

d. Provide slotted bolt holes in rail bracket.

05 50 00- 19

e. Weld bolt heads flush with top of rail.

f. Weld flanged fitting to post where posts are installed in sleeves.

7. Opening Guard Rails:

a. Fabricate rails with flanged fitting at each end to fit between wall opening jambs.

b. Design flange fittings for fastening with machine screws to steel plate anchored to jambs.

c. Fabricate rails for floor openings for anchorage in sleeves.

8. Gates:

a. Fabricate from steel pipe as specified for railings.

b. Fabricate gate fittings from either malleable iron or wrought steel.

c. Hang each gate on suitable spring hinges of clamp on or through bolted type. Use bronze hinges for exterior gates.

d. Provide suitable stops, so that gate will swing as shown.

9. Chains:

a. Chains: ASTM A391, Grade 63, straight link style, normal size chain bar 8 mm (5/16 inch) diameter, eight links per 25 mm (foot) and with boat type snap hook on one end, and through type eye bolt on other end.

b. Fabricate eye bolt for attaching chain to pipe posts, size not less than 9 mm (3/8 inch) diameter.

c. Fabricate anchor at walls, for engagement of snap hook of either a 9 mm (3/8 inch) diameter eye bolt or punched angle.

d. Galvanize chain and bolts after fabrication.

E. Aluminum Railings:

1. Fabricate from extruded aluminum.

2. Use tubular posts not less than 3 mm (0.125 inch) wall thickness for exterior railings.

3. Punch intermediate rails and bottom of top rails for passage of posts and machine to a close fit.

4. Where shown use extruded channel sections for top rail with 13 mm

(1/2 inch) thick top cover plates and closed ends.

5. Fabricate brackets of extruded or wrought aluminum as shown.

05 50 00- 20

6. Fabricate stainless pipe sleeves with closed bottom at least six inches deep having internal dimensions at least 13 mm (1/2 inch) greater than external dimensions of posts where set in concrete.

F. Stainless Steel Railings:

1. Fabricate from 38 mm (1-1/2 inches) outside diameter stainless steel tubing, ASTM A269, having a wall thickness of 1.6 mm (0.065 inch).

2. Join sections by an internal connector to form hairline joints where field assembled.

3. Fabricate with continuous welded connections.

4. Fabricate brackets of stainless steel to design shown.

5. Fabricate stainless steel sleeves at least 150 mm (6 inches) deep having internal dimensions at least 13 mm (1/2 inch) greater than external dimensions of post.

2.16 CATWALKS

A. Fabricate catwalks including platforms, railings, ladders, supports and hangers, and arrangement of members as shown on drawings.

B. Fabricate stairs as specified in Section 05 51 00, METAL STAIRS.

C. Fabricate steel ladders as specified under paragraph LADDERS unless shown otherwise.

D. Fabricate steel pipe railings as specified under paragraph RAILINGS.

E. Catwalk and platforms floor surfaces as shown.

1. Steel gratings as specified under paragraph gratings, either bar or plank type.

2. Steel floor plate.

3. Aluminum floor plate.

F. Prime paint catwalk system.

2.17 TRAP DOOR AND FRAMES WITH CEILING HATCH

A. Design to support a live load as specified.

B. Frames:

1. Fabricate steel angle frame to set in concrete slabs and design to set flush with finished concrete slab or curb. If not shown use 63 x

63 x 6 mm (2-1/2 x 2-1/2 x 1/4 inch) angles.

2. Miter steel angles at corners and weld together.

3. Weld steel bar stops to vertical leg of frame, to support doors flush with the top of the frame.

05 50 00- 21

4. Weld steel strap anchors on each side not over 600 mm (24 inches) on center to the backs of the frames. If not shown use 6 x 50 x 200 mm

(1/4 x 2 x 8 inch) long straps with 50 mm (2 inch bent) ends.

5. Form frames from steel angles with welded corners for reinforcing and bracing of well lining and support of ceiling hatch.

C. Covers:

1. Use 6 mm (1/4 inch) thick steel floor plate.

2. Where double leaf covers are shown, reinforce at meeting edges.

3. Use wrought steel hinges with fixed brass pins.

a. Weld to cover.

b. Secure to frame with machine screws.

4. Where ladders occur, install hinges on the side opposite the ladder.

5. Provide two bar type drop handles, flush with cover when closed for each leaf.

D. Ceiling Hatch:

1. Construct hatch with "T" or angle frame designed to support edge of ceiling and hatch, weld to well lining.

2. Form hatch panels of 3 mm (1/8 inch) steel, 5 mm (3/16 inch) aluminum or 1 mm (0.0359 inch) thick steel of pan type construction with 25 mm (one inch) of mineral fiber insulation between.

3. Use counter balance device, hinges, latch, hangers and other accessories required for installation and operation of hatch with not over 90 N (20 pounds) of force.

4. Fabricate panels flush and reinforced to remain flat.

5. Locate hatch panel flush with frame.

E. Finish with baked on prime coat.

2.18 SIDEWALK DOOR

A. Use flush, watertight, gutter type design.

B. Cover fabricate of 6 mm (1/4 inch) thick, diamond pattern floor plate.

C. Use automatic lock hold open feature and be hung on two flush type heavy bronze hinges capable of 90 degree swing on each door leaf.

D. Equip with locking and latching device and lifting devices; operable and accessible from both sides of doors.

E. Doors removable without disturbing frame.

F. Provide gutters at all joints for drainage of water.

05 50 00- 22

2.19 SCREENED ACCESS DOORS AND FRAMES

A. Galvanized ASTM A123, G-90 after fabrication.

B. Wall frame:

1. Fabricate frame from steel angles or channels as shown.

2. Continuously weld 38 x 13 mm (1-1/2 x 1/2 inch) steel channel door stop to angle frame. Cut out lock strike opening in channel.

3. Miter and weld channel frame at corners. Reinforce corner with 3 mm

(1/8 inch) plate angle.

4. Reinforce channel frame with 3 x 150 mm (1/8 x 6 inch) long steel plate at channel back to cutout for latch. Cutout lock strike opening in channel face. Drill and tap for hinge anchorage.

5. Drill jambs for 6 mm (1/4 inch) bolt anchors at top and bottom and not over 450 mm (18 inches) between top and bottom.

6. Fabricate frame for door to sit flush with face of frame.

C. Doors

1. Fabricate door using steel channel frame with 3 mm (1/8 inch) angle plate reinforcing at corners.

2. Miter and weld corners.

3. Fabricate lock box of 1.6 mm (1/16 inch) plate and weld to channel surround.

4. Provide wire mesh constructed of 3.5 mm (0.135 inch) diameter galvanized steel wire crimped and woven into 38 mm (1-1/2 inch) diamond mesh pattern. Fasten the wire mesh to door frames by bending the ends of each strand of wire over through channel clinched and welded to channel door frame.

5. Weld steel plate back-bands to channel door frame at hinge stiles only.

6. Screen on doors in exterior walls.

a. Fabricate rewirable frame for screen from either extruded or tubular aluminum.

b. Design to allow for removing or replacement frame and screening or adjoining items without damage.

c. Use aluminum insect screening specified.

d. Use stainless steel fasteners for securing screen to door.

05 50 00- 23

D. Hardware:

1. Install hinged door to fixed frame with two 63 mm (2-1/2 inch) brass or bronze hinges.

2. Install lock or latch specified in Section 08 71 00, DOOR HARDWARE in lockbox.

2.20 STEEL COUNTER OR BENCH TOP FRAME AND LEGS

A. Fabricate channel or angle frame with mitered and welded corners as shown.

B. Drill top of frame with 6 mm (1/4inch) holes spaced 200 mm (8 inches) on center for securing countertop.

C. Fabricate legs of angle or pipe shapes and continuously weld to frame.

D. Finish frame with backed on enamel prime coat.

2.21 STEEL PIPE BOLLARD

A. Provide bollard in accordance with ASTM A53 with dimensions as shown in standard detail SD320523-04. Anchor posts in concrete and fill solidly with concrete with a minimum compressive strength of 17 MPa 2500psi.

2.22 LOOSE BEARING AND LEVELING PLATES

A. Provide loose bearing and leveling plates for steel items bearing on masonry or concrete construction. Drill plates to receive anchor bolts and for grouting.

B. Prime plates with zinc-rich primer.

C. Galvanize loose steel lintels located in exterior walls.

D. Prime loose steel lintels located elsewhere with zinc-rich primer.

2.23 FAÇADE PREFABRICATED GALVANIZED STEEL TUBE FRAMES

A. Façade prefabricated galvanized steel tube frames for woven metal mesh panels or perforated aluminum screen panels

2.24 FORMED PLATE VEHICULAR BARRIERS

A. Custom vertical plate or channel shapes to resist vehicular impact in configurations as indicated on Drawings.

1. Minimum 0.625 inch thick plate bases fully welded.

B. Hot dip galvanize and pre apply high performance protective coatings

05 50 00- 24

PART 3 - EXECUTION

3.1 INSTALLATION, GENERAL

A. Set work accurately, in alignment and where shown, plumb, level, free of rack and twist, and set parallel or perpendicular as required to line and plane of surface.

B. Items set into concrete or masonry.

1. Provide temporary bracing for such items until concrete or masonry is set.

2. Place in accordance with setting drawings and instructions.

3. Build strap anchors, into masonry as work progresses.

C. Set frames of gratings, covers, corner guards, trap doors and similar items flush with finish floor or wall surface and, where applicable, flush with side of opening.

D. Field weld in accordance with AWS.

1. Design and finish as specified for shop welding.

2. Use continuous weld unless specified otherwise.

E. Install anchoring devices and fasteners as shown and as necessary for securing metal fabrications to building construction as specified.

Power actuated drive pins may be used except for removable items and where members would be deformed or substrate damaged by their use.

F. Spot prime all abraded and damaged areas of zinc coating as specified and all abraded and damaged areas of shop prime coat with same kind of paint used for shop priming.

G. Isolate aluminum from dissimilar metals and from contact with concrete and masonry materials as required to prevent electrolysis and corrosion.

H. Secure escutcheon plate with set screw.

3.2 INSTALLATION OF SUPPORTS

A. Anchorage to structure.

1. Secure angles or channels and clips to overhead structural steel by continuous welding unless bolting is shown.

2. Secure supports to concrete inserts by bolting or continuous welding as shown.

3. Secure supports to mid height of concrete beams when inserts do not exist with expansion bolts and to slabs, with expansion bolts.

unless shown otherwise.

05 50 00- 25

4. Secure steel plate or hat channels to studs as detailed.

B. Supports for Wall Mounted items:

1. Locate center of support at anchorage point of supported item.

2. Locate support at top and bottom of wall hung cabinets.

3. Locate support at top of floor cabinets and shelving installed against walls.

4. Locate supports where required for items shown.

3.3 COVERS AND FRAMES FOR PITS AND TRENCHES

A. Set frame and cover flush with finish floor.

B. Secure plates to frame with flat head countersunk screws.

C. Set gratings loose in drainage trenches or over pits unless shown anchored.

3.4 DOOR FRAMES

A. Secure clip angles at bottom of frames to concrete slab with expansion bolts as shown.

B. Level and plumb frame; brace in position required.

C. At masonry, set frames in walls so anchors are built-in as the work progresses unless shown otherwise.

D. Set frames in formwork for frames cast into concrete.

E. Where frames are set in prepared openings, bolt to wall with spacers and expansion bolts.

3.5 OTHER FRAMES

A. Set frame flush with surface unless shown otherwise.

B. Anchor frames at ends and not over 450 mm (18 inches) on centers unless shown otherwise.

C. Set in formwork before concrete is placed.

3.6 GUARDS

A. Steel Angle Corner Guards:

1. Build into masonry as the work progress.

2. Set into formwork before concrete is placed.

3. Set angles flush with edge of opening and finish floor or wall or as shown.

4. At existing construction fasten angle and filler piece to adjoining construction with 16 mm (5/8 inch) diameter by 75 mm (3 inch) long expansion bolts 450 mm (18 inches) on center.

05 50 00- 26

5. Install Guard Angles at Edges of Openings in Slab and Overhead Doors where shown.

B. Channel Guard at Top Edge of Concrete Platforms:

1. Install in formwork before concrete is placed.

2. Set channel flush with top of the platform.

3.7 GRATINGS

A. Set grating flush with finish floor; top of curb, or areaway wall. Set frame so that horizontal leg of angle frame is flush with face of wall except when frame is installed on face of wall.

B. Set frame in formwork before concrete is placed.

C. Where grating terminates at a wall bolt frame to concrete or masonry with expansion bolts unless shown otherwise.

D. Secure removable supporting members in place with stainless steel bolts.

E. Bolt gratings to supports.

3.8 STEEL LINTELS

A. Use lintel sizes and combinations shown or specified.

B. Install lintels with longest leg upstanding, except for openings in 150 mm (6 inch) masonry walls install lintels with longest leg horizontal.

C. Install lintels to have not less than 150 mm (6 inch) bearing at each end for nonbearing walls, and 200 mm (8 inch) bearing at each end for bearing walls.

3.9 SHELF ANGLES

A. Anchor shelf angles with 19 mm (3/4 inch) bolts unless shown otherwise in adjustable malleable iron inserts, set level at elevation shown.

B. Provide expansion space at end of members.

3.10 PLATE DOOR SILL

A. Install after roofing base flashing and counter flashing work is completed.

B. Set in sealant and bolt to curb.

3.1…