BNGR083416 Revision 1.pdf

BNGR083416.HGR 083416-1 REVISED BY AMENDMENT 0003

SECTION 083416 - HANGAR DOORS

PART 1 - GENERAL

1.01 SUMMARY:

A. This Section covers the design, fabrication, installation and field wiring of a complete and usable set of hangar doors by the hangar door manufacturer.

1. The doors shall consist of two (2) anchored groups of three (3) leaves, each of which when fully closed, will provide a weathertight enclosure of the entire opening.

2. When fully open, the doors shall provide a minimum unobstructed opening as indicated on drawings.

B. Work under this Section includes the following:

1. All structural design of the hangar doors and all collateral work including the top door guides, bottom rails with structural supports and anchors, hanging head flashing and all other flashing as required for an operable and weathertight installation, and girts for support of exterior and interior metal wall panels and framed openings for windows and personnel doors.

2. All electrical work (material and labor) required for the operation of the doors to the indicated source of power at the hangar door soffit.

C. Related Work Specified Elsewhere:

1. Steel: SECTION 051200.

2. Metal Wall Panels: SECTION 074213.

3. Hollow Metal Doors and Frames: SECTION 081100.

4. Finish Hardware: SECTION 087000.

5. Protective Coatings: SECTION 099000.

6. Basic Electrical Requirements: SECTION 260000.

7. Raceways: SECTION 260533.

8. Wire and Cables: SECTION 260516.

9. Electrical Boxes and Fittings: SECTION 260534.

10. Electrical Connections: SECTION 262730.

11. Wiring Devices: SECTION 262726.

12. Circuit and Motor Disconnect Switch: SECTION 262816.

13. Grounding: SECTION 260526.

14. Transformers: SECTION 262213.

15. Motor Controllers: SECTION 262900.

16. Emergency Exit Lighting: SECTION 265200.

1.02 REFERENCES

A. Applicable Publications: :

1. American Gear Manufacturer's Association (AGMA).

2. American Institute of Steel Construction (AISC):

a. M011 - Steel Construction Manual.

3. American Iron and Steel Institute (AISI):

a. SG671 - Design of Cold-Formed Steel Structural Members.

4. American Society of Civil Engineers (ASCE):

a. 7-88 - Minimum Design Loads for Buildings and Other Structures.

5. American Society for Testing Materials (ASTM):

a. A36/A36M - Carbon Structural Steel.

b. A366 - Steel, Carbon, Cold-Rolled Sheet Commercial Quality.

SECTION 083416 - HANGAR DOORS: continued

BNGR083416.HGR 083416-2 REVISED BY AMENDMENT 0003

c. A446/A446M - Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process, Structural (Physical Quality).

d. A525/A525M - Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process, Commercial Quality.

e. A527/A527M - Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process, Lock-Forming Quality.

f. A569 - Steel, Carbon, Hot-Rolled Sheet and Strip, Commercial Quality.

g. A572/A572M - High Strength Low-Alloy Columbian - Vanadium Steels of

Structural Quality.

h. A588/A588M - High Strength Low-Alloy Structural Steel with 50 ksi (345 MPa)

Minimum Yield Point to 4 Inches Thick.

i. C920 - Elastomeric Joint Sealants.

j. E84 - Surface Burning Characteristics of Building Materials.

6. Building Officials and Code Administrators (BOCA) National Building Code, latest edition.

7. National Electrical Manufacturers Association (NEMA):

a. ICS - Industrial Controls and System.

8. National Fire Protection Association (NFPA):

a. No. 70 - National Electrical Code (NEC).

9. Official codes, rules and regulations adopted by the State of Maine.

10. Underwriters Laboratories, Inc. (UL):

a. 506 - Specialty Transformers.

11. Uniform Building Code (UBC).

B. Provide accessories to meet OSHA regulations including toe guards and audible "unit in motion" warning system.

1.03 SUBMITTALS:

A. Submit as specified in DIVISION 1.

B. Includes, but not limited to, the following:

1. Shop and erection drawings, construction manuals, and other data necessary to completely describe design, sizes, materials, structural connections, structural properties of members, fasteners, all collateral work, operating systems, braking systems, electrical controls, warning and safety devices, and emergency operating systems.

2. Diagrams, performance curves and characteristic curves of equipment and systems.

3. Shop painting and finishing specifications.

4. Design data, catalog cuts and descriptive literature edited to show fully, but only, the hangar door components required.

5. Engineering design calculations for structural members covering components and collateral work, including computer programmed designs, with complete explanation of computer programs used. Submittals shall be accompanied by stress values, the design criteria and procedures used, and attesting to the adequacy and accuracy of the design.

6. All design calculations and drawings shall be signed and sealed by a (registered) professional engineer (registered in the State of Maine).

7. Shop drawings of motors, all electrical control devices, and all electrical control panels, including schematic diagrams, dimensional drawings of control panels, details of control panel installations, internal wiring diagrams of control panels, and wiring diagrams indicating all external connections between control panels and from control panels to remote control devices. Indicate all wire and conduit sizes for field wiring. Furnish list of materials for all control devices, both inside and remote from control panels including

BNGR083416.HGR 083416-3 REVISED BY AMENDMENT 0003

manufacturer's model number, electrical ratings, location, and quantity of each item furnished.

8. Size, spacings, anchor bolt setting patterns and material requirement for the bottom rails.

9. Submit design calculations, drawings and/or certification to proper authorities, if required by law.

10. Samples:

a. Neoprene and metallic weatherstripping. One sample of each type, 23 cm (9 inches) long.

b. Wire rope cable. One sample of each type or size, 23 cm (9 inches) long.

11. Submit six complete manuals containing instructions for proper operation and maintenance of the doors to the Owner. They shall contain complete:

a. Operating instructions.

b. Maintenance instructions.

c. A chart showing all points to be lubricated, type of lubricant required and frequency of servicing and adjustment.

d. A chart giving a checklist of parts to be serviced and adjusted, and the frequency of servicing and adjustment.

e. A suggested list of spare parts.

f. A manufacturer's catalog for each component in or on the doors.

1.04 DELIVERY, STORAGE AND HANDLING:

A. Deliver all materials not shop installed in containers, boxes, etc., marked bearing the manufacturer's name and model. Store in locations free of dust and moisture. Handle with care to prevent damage. Remove damaged items and replace.

1.05 QUALITY ASSURANCE:

A. The hangar door manufacturer shall be one who is regularly engaged in the production of steel hangar doors of type and size required for this project.

B. The installation supervisor shall be an authorized representative of the door manufacturer.

Mechanics shall be skilled and experienced in the erection of hangar doors of type and size required for this project.

1.06 WARRANTY:

A. The entire installation, including materials and operation, shall be unconditionally guaranteed for a period of one year from the date of Substantial Completion of which the hangar doors are a part. During that period, provide repair service when required, and replace any defective or inoperative equipment at no expense to the Owner, including all labor, material, travel or expenses of personnel brought in, and any other costs associated with the solution and correction of the problem. Any equipment replaced or repaired shall bear a new one-year guarantee beginning at the time the replacement or repair was completed.

PART 2 - PRODUCTS

2.01 ACCEPTABLE MANUFACTURERS:

A. Acceptable Manufacturers:

1. Industrial Door Contractors, Inc.

2. International Door, Inc.

3. Norco Industrial Doors.

BNGR083416.HGR 083416-4 REVISED BY AMENDMENT 0003

2.02 GENERAL DESIGN REQUIREMENTS:

A. The hangar doors shall be designed by the manufacturer in conformance with the requirements as shown on the drawings and as specified. Doors shall operate without binding, interference, or damage to weather stripping. Doors shall fit closely and be free from warping.

B. Loading:

1. Design Loads:

a. The maximum deflection of the door leaves, due to design wind loads, shall be limited to the height of the door divided by 180.

b. The doors, when completely closed in the indicated arrangement, shall be designed for the applicable positive and negative wind loads and for all dead, live, and seismic loads. Seismic design shall conform to Seismic Use Group 2.

2. Each horizontal rolling door leaf acting as a unit and all components of the leaf shall be designed to resist all wind and seismic loads indicated or specified. The doors shall be designed so they will not flutter more than plus or minus 6 mm (1/4-inch) from the vertical position at the top of the horizontal rolling doors. The doors shall be complete with all collateral structural steel and related anchorages and shall include, but not be limited to, bottom door rails, top door guides, end closure pieces and door guide bracing.

3. Maximum deflection of the structure at the hangar door, under applied live loads, has been designed to be limited to the following, measured at the point of maximum moment.

a. Uplift deflection: 6 inches.

b. Downward deflection: (10 inches).

c. North-South lateral deflection: (12 inches) wind.

d. East-West lateral deflection: (12 inches) wind.

e. Hangar door manufacturer shall coordinate actual anticipated service deflections with metal building manufacturer.

C. Doors shall be designed and constructed of standard structural steel sections or formed plates of ample size and strength for the loads and stresses imposed under specified conditions in accordance with AISC.

D. Steel Materials:

1. Structural Steel: Shall conform to AISC MO11 and ASTM A36/A36M, A572/A572M with 50 ksi minimum yield, or A588/588M.

2. Cold-Formed Steel: Shall conform to AISI SG671 and shall be not less than 3 mm

(1/8-inch) thick.

3. Galvanized Steel Sheet: Shall conform to ASTM A446/A446M, A525/A525M or

A527/A527M, coating designation G90 galvanized steel sheet, structural, commercial or lock-forming quality.

E. Provide hangar door hardware to accommodate actual dead loads plus wind loads specified.

Provide top guide rollers, bottom wheels, door stops, tractor pulls, track and cleaners.

F. Structural steel for supporting top guides is provided at 10' o.c. min. The top guides shall be designed to span under the provided structural supports.

G. Two overhead trolley busways shall be continuous east-west (except for the middle 20 feet above the two inner most door leaves to allow for the tail door) and centered over the inner most door leaves. Provide busway top box at ends of the two busways.

H. Bottom rails shall be designed by the door manufacturer to resist all dead loads, live loads, wind load, seismic load and operating loads applied to them by the hangar doors.

2.03 DOOR OPERATION:

A. Anchored Group Doors: Each group of leaves shall have a traction-drive operating unit located in the lead leaf of the group and driving one or more wheels of the lead leaf. The

BNGR083416.HGR 083416-5 REVISED BY AMENDMENT 0003

leaves in each group shall start to move at the same time and arrive at their fully open or fully closed positions simultaneously. Necessary cables, fittings, sheaves, housings, guards, brackets, anchors, and miscellaneous hardware shall be provided. Provide doors that require operating personnel to walk with the leaf at it moves.

B. Design drive system so that slippage between drive wheels and rails will not occur under dry weather conditions.

C. Operating Units:

1. Each operating unit shall move its (lead) leaf at a speed of approximately 13.7 meters

(45 feet) per minute at zero wind load conditions and be operable up to and including a maximum wind load of 39.056 kg per square meter (8 pounds per square foot). The operating units shall consist of either a separate motor and gear reducer or a gearhead motor, high-speed magnetic shaft brake, and necessary roller chains and sprockets. The drive units shall be overload protected and shall be convertible to tractor towing in the event of electrical power failure.

2. Operating Systems for Hangar Doors: The lead leaf shall be operated by traction-type drive units.

a. The operator unit shall drive the double-flanged wheels of the door leaf by means of steel roller chains and sprockets. Each operator shall have the capability of operating the leaf using the overload capacity of the drive unit.

b. Each traction-type drive unit shall be complete and shall consist of a variable-speed, constant-torque motor with a high-speed shaft brake, and separate or combined gear reducer properly mounted on an adjustable drive base, and the necessary sprockets, roller chains, bearings and chain-tensioning devices. When the (lead) door leaf is within 1.2 meters (4 feet) of the normal fully-closed position, the door operating speed shall be automatically reduced to 3.0 meters (10 feet) per minute maximum.

c. After the components are mounted, aligned and tightened into position on the drive bases, steel blocks shall be fitted around the feet of the components and welded to the drive base to prevent the components from changing alignment.

d. The drive bases shall be pivoted on the door leaf framing supports by means of separate compression and tension adjusting links so as to maintain proper tension in the roller chains. The drive bases shall be designed to rigidly support the drive components without deflection or torsional rotation under the operating loads.

e. The drive motors shall be ball bearing, squirrel cage induction, totally-enclosed crane-and-hoist duty type of sufficient horsepower to operate the doors under the design criteria. They shall be rated for intermittent duty 55°C ambient, NEMA Design D and wound for service at 460V, 3-phase, 60-hertz. All units shall be supplied with motor starters. The drive motor and motor starter shall be mounted higher than 1.3 meters (4.27 feet) above the hangar floor.

f. The gear reducers shall be the product of a manufacturer with an established reputation for highest quality reducers of this type. They shall be of the helical worm gear, high-efficiency type, fan cooled, internally lubricated, with an AGMA service factor of 1.5. A high helix angle shall allow reversal of effort through the gears without damage to the units. The gears shall be nonself-locking. The reducers shall be furnished with the proper quantity of AGMA No. 7 compound gear-reducer oil. The reducers shall be filled in the field after installation in the doors. The gear reducer shall be mounted higher than 1.3 meters (4.27 feet) above the hangar floor.

g. The drive and pinion sprockets shall be highest quality hardened steel of suitable size, thickness, and number of hardened cut teeth for the speed and service.

BNGR083416.HGR 083416-6 REVISED BY AMENDMENT 0003

h. The roller chains shall be precision steel single strand, fatigue resistant, heat treated, and shall have a minimum 5:1 safety factor under normal operating conditions.

i. Access to the motor-operator units, roller chains, sprockets, etc., shall be provided by hinged access panels located on the inside of the leaves at the operator locations.

D. Braking Systems: Braking systems shall be designed to ensure stoppage of the door leaf under normal, dry rail conditions. The braking systems shall be fail-safe type of a magnetic solenoid system operating on the motor armature. Brakes shall have a manual release lever that will allow for the towing of the door. Brake release lever shall be accessible for operation when the door is in the closed or stacked open position. The hand release shall be an automatic reset type so that the brake will be operable during subsequent electrical operation of the door.

1. The high-speed shaft brakes integral with the motors shall function solely to stop the rotation of the motor armatures and shall be of the spring set solenoid release self-adjusting disc type. They shall have a retarding torque of not less than 100% motor torque and shall be wound for 460V, 3 phase, 60 hertz. Brakes shall be capable of stopping the door leaf when running at full speed within 10.2 cm (4 inches) after the brake is applied. The electric brakes shall be mounted higher than 1.3 meters (4.27 feet) above the hangar floor.

E. Controls:

1. Electrical Controls for Hangar Doors: The door manufacturer shall furnish for each powered door leaf, complete and proper electrical equipment and controls, built in accordance with the latest NEMA standards. Provide electrical interlocks on personnel door to protect personnel during operation.

2. A permanent placard shall be installed near the hangar door location indicating complete operating instructions for the hangar doors. Instructions shall be in the English language.

Additional placards shall be installed located near each of the door operators indicating instructions for brake release to operate door leaf by tractor pull. Each placard shall be composed of laminated plastic with 6 mm (1/4-inch) high letters.

a. Operating switches for each horizontal rolling door leaf shall consist of one heavy-duty control station and shall be installed on the interior faces near the leading edge of each lead of the leaf. Control station shall be heavy-duty, two-element, momentary contact, push-button stations requiring operators to "walk" each anchored group so that the group will stop automatically when pressure is removed from the button. Each control station shall include push buttons clearly marked "OPEN" and "CLOSE". Push buttons shall be in watertight NEMA 4 enclosures.

Push-button stations shall be mounted higher than 1.3 meters (4.27 feet) above the hangar floor.

b. Each electrical panel shall have a NEMA 4 enclosure, with an access door having a tamperproof door latch and containing a lockable handle that operates a disconnect switch located inside and so arranged that the door cannot be opened until the handle switch is rotated to the "off" position. The access door shall also contain an external manual reset button for the overload relay. The bottom of the panel shall be mounted 1.3 meters (4.27 feet) minimum above finished floor and shall be completely equipped to provide the functions and indications as specified.

F. Limit Switches: Limit switches shall be provided to stop the travel of each lead leaf in their fully-opened positions. The limit switches shall be positive acting snap action type with actuating cams designed with sufficient overtravel to permit the door leaf to come to a complete stop without overtraveling the limit switch. Actuating cams shall be mounted on the top guides. Limit switches shall have NEMA 4 enclosures. Limit switches shall be mounted on top of the hangar door. The limit switches shall be mounted on the same door leaf which

BNGR083416.HGR 083416-7 REVISED BY AMENDMENT 0003

carries the operator. Provide limit switches to stop travel of each anchored group of doors during the closing operation when the leading edge of the door reaches the closed position.

2.04 HANGAR DOORS:

A. Structural Framing: Framing members shall be either structural steel sections and true to dimension and square in all directions and shall not be out of line horizontally or vertically more than 3 mm (1/8-inch) in 6.10 meters (20 feet). Full depth members or gusset plates at the 1/4 points shall be considered minimum lateral support for all main members. Doors leaves shall be of bolted or welded construction. If bolting is used, fasten main members with rib or high tensile bolts. All joints shall be designed to develop 100% of the strength of the intersecting framing members. Provide diagonal bracing so that the completed leaf assembly will be adequately braced to withstand shipping, assembly, and operational loads. Vertical members shall be continuous throughout the height of the leaf and those adjoining each other shall be accurately prepared to facilitate field assembly by bolting.

1. Framework for door leaves shall be fabricated to prevent bowing, racking or warping during fabrication and to hold the sections to specified tolerances. Exposed welds and welds which interface with the installation of various parts such as metal panels, shall be ground smooth. Horizontal members shall be provided to limit the unsupported vertical span of exterior and interior metal panels so that the allowable stresses and deflections for Metal Wall Panels, as specified in SECTION 074213, will not be exceeded.

2. Full depth vertical and horizontal framing members shall be provided at each pedestrian door opening as indicated.

3. Provide necessary structural framing and holes in the leaves for exit lights, interlock switches, alarm signals and similar items of electrical equipment.

B. Top Rollers:

1. Each horizontal rolling door leaf shall be provided with a minimum of two telescoping or

"floating" type top roller assemblies. Each assembly shall consist of four (4) horizontal and four (4) vertical steel rollers held captive by the top roller guides and mounted on a truck connected to a vertical steel post, which in turn slides within sleeve bearings attached to the door leaf framing. Rollers shall have factory-sealed, lifetime-lubricated roller or ball bearings.

2. Roller assemblies shall be capable of resisting the required wind and operating loading, and shall be designed to permit vertical movement of the structure above in addition to the movement attributable to the required wind and dead loading.

3. Roller assemblies shall be accessible and removable through the top of the guide system.

C. Bottom Wheels: Provide each door leaf with a minimum of two bottom wheel assemblies.

Wheels have a minimum tread diameter of 15 inches or larger if required to adequately carry the load and to permit removal without taking the door leaves from their position on the rails.

Where the height-to-width ratio of the door leaf exceeds three, wheel assemblies shall be vertically adjustable. Center flanged wheels are not acceptable.

1. Wheels shall be fabricated of carbon steel plate conforming to ASTM A36/A36M.

Treads shall be machined concentric with the bearing seats and to fit ASCE rails. The clear distance between flanges shall not exceed the width of the rail by more than 3 mm (1/8-inch) at the tread nor more than 6 mm (1/4-inch) at the edge of the flange. Machine internal bearing seats accurately for a press fit. Treads of wheels 46 cm (18 inches) or larger in diameter shall be hardened on their wearing surfaces to 320 Brinnell, minimum.

2. Bearings: Each wheel shall be provided with two tapered roller bearings. Bearing units shall be mounted in the wheel assembly so that both the vertical dead loads and the horizontal wind loads can only be transmitted from the leaf to the wheel through the

BNGR083416.HGR 083416-8 REVISED BY AMENDMENT 0003

bearings. Bearings shall be provided with seals to retain the grease and prevent the entrance of dirt and shall be equipped with approved type nonleak, high-pressure throat or surface check lubricating fittings recessed into the interior metal wall panels, convenient for lubrication without removing covers. Bearings shall have minimum L10 life of 3,000 hours at 500 rpm with full operating wind load.

D. Top Guides and Bottom Rails: Provide and install bottom rails and top guides for hangar doors, including, but not limited to supports, spacer beams, clips, alignment and adjustment devices, shims, stops, and anchors. Lengths of rails and guides shall provide for the maximum expected overrun for either closing or opening operation.

1. Top guides shall consist of rolled steel channels or similar configuration to hold the top rollers of the hangar doors captive, with other structural steel as needed to transfer all design loading to the building structure. The nominal elevation shall be maintained within plus or minus 6 mm (1/4-inch). The nominal center-to-center dimension shall be maintained within plus or minus 3 mm (1/8-inch), with variation from nominal at no greater rate than 3 mm (1/8-inch) in 6.10 meters (20 feet). Joints of head guides shall be welded and ground so that adjoining guide surfaces have a smooth transition. Hangar top door guides shall be installed after truss shoring is removed. Top guide tolerances shall be met after dead load is imposed upon building frame.

2. Bottom rails shall be designed by the door manufacturer to adequately carry the door wheel loads and the wind loads. AISC Section 1.5.1.5 "Bearings" shall be used to determine the rail size, however, the minimum size shall be ASCE (30 pounds per yard).

Rails shall not be installed prior to the top guide system has been installed. Rails shall be set to elevation within plus or minus 6 mm (1/4-inch), with variations from elevation at no greater rate than 3 mm (1/8-inch) in 6.10 meters (20 feet). The nominal design relationship between top guides and bottom rails shall be maintained without exception.

Center-to-center dimensions of bottom rails shall be maintained within plus or minus 3 mm (1/8-inch) with variation from nominal at no greater rate than 3 mm (1/8-inch) in

6.10 meters (20 feet). Rail joints shall be either welded and ground smooth or provided with splice plate installed in accordance with ASCE standards.

E. Hanging Head Flashing: Provide with the top guide system. Fabricate of galvanized steel sheet, not lighter than 1 mm (16 gauge), reinforced as required. Show exact location and configuration on top guide shop drawings. The top guide and head flashing system shall be shop assembled to verify accuracy of fit and fastener location, and disassembled for shipping.

Head flashing shall be installed after doors are in place.

F. Door Stops: Provide two mechanical bumpers of 60 durometer neoprene bolted to stop beams embedded in concrete at the end of each door rail to prevent the leaves from coming in contact with the upper end walls. The bumpers shall be mounted parallel to one another on the bumper posts at an elevation above the floor such that they contact only the main bottom horizontal channels of the leaves, which shall be steel reinforced at the points of impact. Provide neoprene bumpers with suitable stops also at the door guides above, to make similar contact with the upper part of the door leaves.

G. Supports:

1. Wheel Carriages: The wheels for each leaf shall be mounted in specially constructed, welded and machined-wheel carriages, stress relieved after welding and before boring.

The ends of the finished and full assembled wheel carriages shall be 100% welded or bolted into the bottoms of the main vertical framing members of the door leaf sections.

2. Motor-Operator Drive Base Supports: Bases shall be supported on rigid structural leaf framing designed to prevent deflection or torsional rotation under the loads imposed during operation of the rolling doors. The supports shall locate the bottom of the

BNGR083416.HGR 083416-9 REVISED BY AMENDMENT 0003

operating equipment high enough above the driven wheels so that the wheels can be removed from the leaves. The drive base support framing shall be designed so that the drive base and operating equipment can be easily adjusted with separate pressure and tension members to maintain proper tension in the roller chain drive. Slotted hole adjustments are not acceptable.

3. Ballast Supports: Frame the leaf area immediately adjacent to the motor operator units and drive to receive concrete ballast of the necessary weight to achieve a coefficient of adhesion of 0.25 between the driven wheels and a dry rail so that the doors will start without slippage, if required.

H. Weathering:

1. Each door leaf shall be weathertight over the entire surface exposed to the exterior, in the closed arrangement. Tightly close spaces between and all around each door leaf, including spaces adjacent to the fixed opening jambs, heads and floor, with flexible material with an average crack opening not in excess of 6 mm (1/4-inch). Exterior bottom seal shall be adjustable for wearing.

2. Design weatherstripping and other components to prevent rubbing, wiping abrasion or similar defacing of exposed finished surfaces of the hangar doors or other parts of the building during operation of the hangar door system.

I. Weatherstripping Material: Provide material which is adjustable and readily replaceable on vertical edges, sills, and heads to afford a substantially weathertight installation.

1. Neoprene: Provide flap-type, two-ply, cloth-inserted neoprene or extruded, double flap, single or dual opposed solid neoprene material on vertical edges and sills. The two-ply material shall have a minimum thickness of 3 mm (1/8-inch) and shall be retained continuously for its full length and secured with rust-resistant fasteners 30 cm (12 inches) on center. Extruded weather stripping with heavy center section shall be attached at 30 cm (12 inches) on center, but continuous bar may be omitted. Clearance between metal parts on vertical edges of leaves and between leaves and jambs which are to be weather-stripped shall be as indicated.

2. Metallic: Head weatherstripping material between each leaf and the top guide system shall be formed of not less than 1.5 mm (16-gauge) galvanized steel sheet.

3. Hanging Head Flashing: Provide cloth-inserted neoprene weathering fastened to top of door leaves to engage the hanging head flashing when doors are closed.

J. Rail Wipers: Provide suitable and removable rail wipers to clear debris from the railhead and the wheel flange grooves as the leaves are moving. The wipers shall be located outboard of the wheels on each leaf and be nonsparking material.

K. Toe Guards: Attach an adjustable, flexible toe guard, reaching to the floor, to the interior bottom edge of each leaf, three feet to each side of the bottom rollers.

L. Tractor Pulls: Provide a tractor pull (towing eye) on the leading edge of each anchored group so that each anchored group can be towed by a tractor or similar equipment in the event of power failure.

M. Tow Bar: Provide a tow bar for each anchored group. Tow bar shall be compatible with type of towing equipment to be used for towing of doors. Provide storage compartment in each anchored group for storage of tow bar.

N. Cable System for Anchored Group Doors:

1. Cable system shall be concealed in the door leaves.

2. The minimum size for the cable which interconnects the leaves shall be 9.5 mm (3/8-inch); the cables shall be improved plow steel with lubricated hemp centers or wire rope cores. Sheaves over which the cables operate shall have a diameter of at least 18 cable diameters and either sealed ball- or roller-type bearings or graphite bronze bearings of a

BNGR083416.HGR 083416-10 REVISED BY AMENDMENT 0003

sufficient capacity for the operating loads. Grease fittings shall be provided for the sheave bearings unless permanently lubricated bearings are used.

3. The cable systems of each group shall be of the horizontal linear type consisting of a horizontal cable mounted on sheaves that pass through the interior and access the back side of the door leaves. The system shall be so designed that the cables may be pre-tensioned prior to the application of operating loads. Cables shall be so reeved that they can readily be disconnected and removed for replacement.

O. Access Panels:

1. Provide flat metal access panels, on interior side of door leaves, at motor operators and at each wheel as required for maintenance and servicing. Access panels shall be removable-type at wheels and hinged-type at operator units and storage compartments. All edges of access panels shall be sealed. Removable-type panels shall be fastened on all edges.

Hinged-type access panels shall be equipped with keyed-alike locks to limit unauthorized access to operator units.

2. Fabricate access panels of minimum 3 mm (11 gauge) galvanized steel sheet. The clear unsupported area of access panels shall not exceed 2.3 square meters (25 square feet).

P. Inner Metal Liner Panel:

1. Provide metal liner panel at entire inner surface of hangar door. See SECTION 074213 for metal liner panels.

Q. Cover hangar door on exterior side with Metal Panel Wall System as indicated. Spacing of supports for metal panels shall be consistent with spanning capabilities of the actual panels being provided and the required design loads. Metal panel installation shall include trim, flax weathering, closures, fasteners, and other accessories as required. Fasteners shall be of the type, size, and spacing as required and recommended by the metal panel manufacturer to meet the design loading requirements.

R. Personnel Doors: Shall be hollow metal doors and frames as specified in SECTION 081100 and as indicated in the Door Schedule and shall include finish hardware as specified in SECTION 087000, furnished and installed by those Sections.

2.05 COLLATERAL WORK:

A. Electrical Work:

1. All electrical material and work shall be in accordance with DIVISION 26, and the National Electrical Code (NEC). The areas over 46 cm (18 inches) above the hangar floor are designated as nonhazardous areas. All other areas are Class I, Division 2 hazardous areas. All electrical equipment and installations in the hazardous areas shall be explosionproof. All electrical enclosures in nonhazardous areas inside and outside the hangar shall be NEMA 4. Electrical devices necessary for motor operation of the doors shall be provided, including push-button stations, limit switches, combination fused disconnect switch and magnetic reversing starters, fused control circuit transformers, relays, timing devices, warning devices, and overhead busways with collector or trolleys.

The electrical power feeder system and control system for each door group shall be of the overhead copper trolley busway type. The source of power for the hangar doors is the disconnect switch mounted 4 feet above finished floor as indicated. Voltage drop from indicated power source to each door motor shall not exceed 3% with 6 leaves operating simultaneously.

2. Motor starters shall be solid state, variable frequency drive, reversing motor starters.

Motor starters shall be programmable for time and value of motor speeds and shall maintain constant torque characteristics over the motor speed range. Motor starters shall be factory wired, with overload and under voltage protection, equipped with electrical

BNGR083416.HGR 083416-11 REVISED BY AMENDMENT 0003

interlocks, control transformers, relays and fused power disconnect switches, all enclosed in NEMA 4 cabinets. Power voltage shall be 460V, 3 phase, 60 hertz. Control voltage shall be 120V. The bottom of the motor starter shall be mounted 1.3 meters (4.27 feet) above hangar floor.

3. Provide a Red LED illuminated exit sign above each personnel door. Exit signs shall be flat wall-mounting, single face units in cast aluminum cases with hinged doors. The glass panels shall be white with 15-cm (6-inch) high letters reading: EXIT and English. Unit shall not project beyond the face of door.

4. Provide each hangar door group with an audible alarm signal which shall automatically sound 5 seconds before the door group moves and sound continuously while the door group is moving. Signal shall be heard above anticipated normal hangar and flight-line noise and shall be a sound different from that of the fire alarm system.

5. Provide a warning light installed within a window in each powered leaf of the hangar doors. Light shall be permanent-mount rotating beacon type suitable for operation at 120Vac, 60-hertz power. It shall consist of a 220-watt sealed beam lamp rotated beneath a heat resistant red color polymer dome and a die cast shock mount housing. The lamps shall be supported by a yoke with a hinged steel band and spring retainer. Beam angle shall be adjustable. Warning light shall automatically signal 5 seconds before movement of the door and shall continue while door is being operated. Warning light shall be mounted in the door, approximately 18 feet above the floor and shall be visible through the window to the exterior and to the hangar interior.

6. Provide galvanized rigid steel conduit, liquid-tight flexible steel conduit, 600V THWN wire, flexible cables, boxes, devices, and accessories in conformance with the requirements of DIVISION 26. If permanent electrical power is not available when door installation is complete, provide temporary power in conformance with the requirements of DIVISION 26, for testing and adjusting the doors.

7. Provide electric interlock switch mounted higher than 1.3 meters (4.27 feet) above hangar floor for each personnel door such that no hangar door group can be operated unless the personnel door is fully closed.

8. Provide a safety edge on the edge of the middle of the two leading leaves from 18-inches above the floor up to 10 feet above the floor that shall automatically stop the door when contacted.

2.06 MISCELLANEOUS MATERIALS:

A. Fasteners 6 mm (1/4-inch) and smaller in diameter shall be stainless steel. Fasteners larger that

6 mm (1/4-inch) diameter shall be either zinc-coated or cadmium-plated steel.

B. Sealants shall be single-component or multi-component type conforming to ASTM C920, Type

S or M, Grade NS, Class 12.5, use NT. Provide a sealant that has been tested on the types of substrate to which it will be applied.

PART 3 - EXECUTION

3.01 INSTALLATION:

A. Doors and accessories shall be installed by the hangar door manufacturer under a contract to their firm in accordance with approved shop drawings and shall include the installation of top guides, bottom rails with structural supports, connection and setting door frames, installation of all seals, bumpers and hardware, installation of all necessary wiring, conduit, fittings, junction boxes, limit switches, devices, illuminated exit signs, push buttons, control panels, warning lights, audible alarms, control trolley busway, power trolley busway, disconnect switches and

BNGR083416.HGR 083416-12 REVISED BY AMENDMENT 0003

electrical cables. Do not install control or power trolley busway or erect doors until the work of other trades in preparing the opening has been completed, the hangar roof is under full dead load, and the top guide and bottom rail system is within specified tolerances.

B. The door manufacturer shall provide an authorized representative to supervise erection of doors. The representative shall be experienced in the erection of hangar doors of this type and shall be present during start-up of door operation and during checkout.

C. Bottom rails with structural supports and anchors shall be set in position, leveled and aligned by the general contractor.

3.02 SHOP AND FIELD PAINTING:

A. Prepare surfaces and paint as specified in SECTION 099000.

B. After erection is complete and before final painting is started, the painting contractor shall thoroughly clean all abraded surfaces, field welds, and bolts, and coat with touch-up priming paint.

3.03 TESTING:

A. Acceptance Test:

1. Immediately after the door installation is complete, the door manufacturer or his representative shall perform a complete operating test in the presence of the Owner's Representative. The operating test shall consist of not less than six complete opening and closing cycles for each door, and such other tests as may be directed for inspection and acceptance purposes.

2. Any defects disclosed by the test shall be corrected, final adjustment of the doors and operating equipment shall be made, and the complete installation turned over to the Owner in a completely acceptable and proper operating condition.

3.04 DEMONSTRATION:

A. After completion and acceptance of the door installation, the hangar door manufacturer shall provide the services of a competent factory service engineer for a period of at least two days, to instruct all shifts of the Owner's operating and maintenance personnel in the proper operation, lubrication, maintenance and servicing of the doors and operating systems.

END OF SECTION 083416