Att. 3 Specifications 250328.pdf

Seagull Guard Station - Bunkhouse Replacement Project

TABLE OF CONTENTS TOC-1

SEAGULL GUARD STATION

BUNKHOUSE REPLACEMENT PROJECT

Date Issued: 03/28/2025

SECTION TITLE

Division 1 - General Conditions

011000 Summary 012700 Measurement and Payment 012800 Mobilization 013100 Project Management 013300 Submittals 014000 Quality Control 014100 Construction Surveying and Staking 014200 References 015000 Temporary Facilities and Traffic Control 017000 Execution 017700 Closeout Procedures

Division 2 - Existing Conditions 024119 Selective Demolition

Division 3 - Concrete 033000 Cast-In-Place Concrete

Division 4 - Masonry 042000 Unit Masonry

Division 13 - Special Construction 133423 Fabricated Structures

Division 22 - Plumbing 221100 Water Distribution System 221353 On-Site Septic System/ Sanitary Sewer System

Division 23 - HVAC 230500 Basic HVAC Materials & Methods

Division 26 - Electrical 260500 Basic Electrical Materials & Methods

Division 27 - Communications 270000 Generic Telecommunications Cabling

TABLE OF CONTENTS TOC-2

Division 31- Earthwork

311100 Site Clearing 312000 Earth Moving

Division 32 - Exterior Improvements 329200 Turf and Grasses

Appendix Attachments:

1) Forest Service Petition For Building Code Variance, dated Wednesday, February 5, 2025. Topic: Superior National Forest Seagull Guard Station Crew Quarters – Automatic Sprinkler System Building Code Variance.

Approved by R9 Director of Engineering 2/07/2025.

2) DR300-001-K Installation of Telecommunications Cables in Federal Buildings, Dated November 13, 2019, (Departmental Regulation published by the U.S. Department of Agriculture)

3) Asbestos Laws and Regulations, published by the U.S. Environmental Protection Agency, https://www.epa.gov/asbestos/asbestos-laws-and-regulations

4) What is IT? Version 14.0, Dated September 19, 2022 https://www.epa.gov/asbestos/asbestos-laws-and-regulations https://www.epa.gov/asbestos/asbestos-laws-and-regulations

SELECTIVE DEMOLITION 024119 - 1

SECTION 024119 - SELECTIVE DEMOLITION

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes, but is not limited to, the following:

1. Demolition and complete removal of all indicated existing constructions.

a. Existing bunkhouse structure, slab, and above grade appurtenances

b. Existing septic system near the Warehouse Building

1) NOT the existing septic system serving the existing house which is to remain

c. Miscellaneous Government-owned site utility features as indicated and as required to complete the work

2. Removal of all Government-owned above-grade water, sewer, electrical, and telecommunications features which will not be reused after the construction of this Work, whether specifically indicated for removal or not.

a. Coordinate demolition/removal of unused Utility-owned features with Utility and the Government.

3. Partial demolition and/or proper abandonment in-place of Government-owned below-grade water, sewer, electrical, and telecommunications features that are not to be reused and are not indicated to be removed.

4. Proper removal and lawful disposal of all demolition-generated material off Government property.

a. Waste materials shall be recycled to the full extent practicable in the project area.

1.2 DEFINITIONS

A. Remove: Detach items from existing construction and dispose of them off-site unless indicated to be salvaged or reinstalled. (Demo)

B. Remove and Reinstall: Detach items from existing construction, in a manner to prevent damage, prepare for reuse, and reinstall where indicated.

C. Existing to Remain: Leave existing items that are not to be removed and that are not otherwise indicated to be salvaged or reinstalled. Protect property and equipment from damage and soiling during all phases of work on the site.

D. Abandon: Remove the portions of items indicated that are visible above ground. Below-ground utilities may remain in place unless designated to be removed. Below-ground utilities that

SELECTIVE DEMOLITION 024119 - 2

are left in place shall be capped/terminated as appropriate. Any portions of utilities to be abandoned that interfere with construction shall be removed to the limit required for new construction or as SHOWN ON THE DRAWINGS.

1.3 QUALITY ASSURANCE

A. Regulatory Requirements: Comply with governing EPA and State of Minnesota notification regulations, if any, before beginning selective demolition. Comply with hauling and disposal regulations of authorities having jurisdiction.

B. Standards: Comply with ASSE A10.6 and NFPA 241.

1.4 PROJECT CONDITIONS

A. Conditions existing at time of inspection for bidding purpose will be maintained by Government as far as practical.

B. Notify Government of discrepancies between existing conditions and Drawings before proceeding with selective demolition.

PART 2 - PRODUCTS (Not Applicable)

PART 3 - EXECUTION

3.1 EXAMINATION

A. BEFORE BEGINNING WORK IN THIS SECTION:

1. Inspect existing conditions and correlate with requirements indicated on the drawings and/or in the specifications to determine extent of selective demolition required.

2. Coordinate any items to be salvaged for the Government with the CO

3. Coordinate the plan of work (extents, methods, schedule, etc.) with CO.

B. Any planned construction or demolition activity that will or might affect the use of the site by the Forest Service staff must be approved in writing at least 2 business days before this activity begins.

C. Verify that utilities have been disconnected, reattached and/or capped as necessary. Contractor is responsible for coordination with utility providers as required.

3.2 SELECTIVE DEMOLITION, GENERAL REQUIREMENTS

A. Site Access and Temporary Controls: Conduct selective demolition and debris-removal operations to ensure minimum interference with buildings, roads, streets, walks, walkways, and other adjacent occupied and used facilities. Barricade work areas from Public access, as needed.

Coordinate potential impacts to Government Operations with CO before starting the associated work.

SELECTIVE DEMOLITION 024119 - 3

B. Existing Services/Systems: Maintain services/systems indicated to remain and protect them against damage during selective demolition and all work operations on the site.

C. Neatly cut openings and holes plumb, square, and true to dimensions required. Use cutting methods least likely to damage construction to remain or adjoining construction. Use hand tools or small power tools designed for sawing or grinding, not hammering and chopping. Temporarily cover openings to remain.

D. Remove all existing infrastructure not to be reused that is visible above ground and/or where it conflicts with new utility installation. Remove such items to a depth of 12” below finished grade.

Cap below-ground water lines and/or conduits that are left in place with non-shrink grout.

E. Any voids in the ground left from removed objects shall be filled with clean soil. Excess soil from other excavations on site can be used for this fill if it is clean.

F. Unless noted for salvage, all removed items and debris removed become the property of the Contractor and shall be properly disposed of off Government property. Loads of demo debris shall be hauled in a safe and tidy manner that meets all regulations and requirements.

G. Concrete and pavements which are to be saw-cut prior to removal shall be cut to full depth to produce a neat, clean vertical edge.

1. Contractor must have written approval from the CO/COR before cutting or removing concrete or asphalt that is adjacent to concrete or asphalt to remain.

H. Removed and Salvaged Items:

1. Clean salvaged items.

2. Pack or crate items after cleaning. Identify contents of containers.

3. Temporarily store items in a secure location as needed until delivery to the designated storage area.

4. Transport items to the Government’s storage area designated by the CO/COR within or adjacent to the project site.

5. Protect items from damage during transport and storage.

I. Removed and Reinstalled Items:

1. Clean and repair items to functional condition adequate for intended reuse.

2. Pack or crate items after cleaning and repairing. Identify contents of containers.

3. Temporarily store items in a secure location until reinstallation.

4. Protect items from damage during transport and storage.

5. Reinstall items in locations indicated. Comply with installation requirements for new materials and equipment. Provide connections, supports, and miscellaneous materials necessary to make item functional for use indicated.

3.3 DISPOSAL OF DEMOLISHED MATERIALS

A. Disposal: Legally transport & legally dispose of demolished materials off Government property.

B. Clean Up: After demolition work has been completed, finish all disturbed areas (except trench area required to be mounded) to a smooth, uniform grade and texture, well-blended to the original

SELECTIVE DEMOLITION 024119 - 4

contours, showing minimum evidence of construction activity. Ensure all paved surfaces are repaired to a smooth condition and are swept clean. Clean all interior and exterior surfaces of concrete dust, debris, etc. to pre-construction condition.

END OF SECTION 024119

CAST-IN-PLACE CONCRETE 033000 - 1

SECTION 033000 - CAST-IN-PLACE CONCRETE

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Concrete standards.

2. Concrete materials.

3. Admixtures.

4. Fiber reinforcement.

5. Curing materials.

6. Accessories.

PART 2 - PRODUCTS

2.1 CONCRETE STANDARDS

A. ACI Publications: Comply with ACI 301 unless modified by requirements in the Contract Documents.

2.2 CONCRETE MATERIALS

A. Cementitious Materials:

1. Portland Cement: ASTM C150/C150M, Type I.

B. Normal-Weight Aggregates:

1. Coarse Aggregate: ASTM C33/C33M,

a. Maximum Coarse-Aggregate Size: 1-1/2 inches nominal

2. Fine Aggregate: ASTM C33/C33M.

2.3 ADMIXTURES

A. Air-Entraining Admixture: ASTM C260/C260M.

B. Chemical Admixtures (if used): Do not use calcium chloride or admixtures containing calcium chloride.

1. Water-Reducing Admixture: ASTM C494/C494M, Type A.

2. Retarding Admixture: ASTM C494/C494M, Type B.

3. Water-Reducing and -Retarding Admixture: ASTM C494/C494M, Type D.

4. High-Range, Water-Reducing Admixture: ASTM C494/C494M, Type F.

CAST-IN-PLACE CONCRETE 033000 - 2

5. High-Range, Water-Reducing and -Retarding Admixture: ASTM C494/C494M, Type G.

6. Admixtures with special properties, with documentation of claimed performance enhancement, ASTM C494/C494M, Type S.

C. Mixing Water for Concrete Mixtures and Water Used to Make Ice: ASTM C1602/C1602M.

Include documentation of compliance with limits for alkalis, sulfates, chlorides, or solids content of mixing water from Table 2 in ASTM C1602/C1602M.

2.4 FIBER REINFORCEMENT

A. Synthetic Monofilament Microfiber: Monofilament polypropylene microfibers complying with ASTM C1116/C1116M, Type III, ¾” long min.

2.5 CURING MATERIALS

A. Absorptive Cover: AASHTO M 182, Class 2, burlap cloth made from jute or kenaf

B. Moisture-Retaining Cover: ASTM C171, polyethylene film burlap-polyethylene sheet.

1. Color:

a. Ambient Temperature Below 50 deg F (10 deg C): Black.

b. Ambient Temperature between 50 and 85 deg F (10 and 29 deg C): Any color.

c. Ambient Temperature Above 85 deg F (29 deg C): White.

C. Water: Potable water that does not cause staining of the surface.

D. Clear, Waterborne, Membrane-Forming, Dissipating Curing Compound: ASTM C309, Type 1, Class B.

E. Clear, Waterborne, Membrane-Forming, Nondissipating Curing Compound: ASTM C309, Type 1, Class B.

F. Clear, Waterborne, Membrane-Forming, Curing and Sealing Compound: ASTM C1315, Type 1, Class A.

2.6 ACCESSORIES

A. Expansion- and Isolation-Joint-Filler Strips: ASTM D1752, cork or self-expanding cork.

2.7 CONCRETE MIXTURE MATERIALS

A. Prepare design mixtures for each type and strength of concrete, proportioned on the basis of laboratory trial mixture or field test data, or both, in accordance with ACI 301.

1. Use a qualified testing agency for preparing and reporting proposed mixture designs, based on laboratory trial mixtures.

CAST-IN-PLACE CONCRETE 033000 - 3

2.8 CONCRETE MIXTURE CLASS TYPES

A. Class A: Normal-weight concrete used for exterior slabs, sidewalks, footings, grade beams, and tie beams.

1. Exposure Class: ACI 318Class F2-Freeze Thaw

2. Minimum Compressive Strength: 4000 psi at 28 days.

3. Air Content:

a. Exposure Classes F2 and F3: 5.5 percent, plus or minus 1.5 percent at point of delivery (for concrete containing 1-1/2-inch nominal maximum aggregate size).

4. Synthetic Microfiber: Uniformly disperse in concrete mixture at manufacturer's recommended rate, but not less than a rate of 1.0 lb/cu. yd.

a. NOTE: fiber reinforcing is to be used in addition to any steel reinforcing shown elsewhere in theses drawings and specifications.

2.9 CONCRETE MIXING

A. Ready-Mixed Concrete: Measure, batch, mix, and deliver concrete in accordance with ASTM C94/C94M and furnish delivery ticket.

B. Project-Site Mixing: Measure, batch, and mix concrete materials and concrete in accordance with ASTM C94/C94M. Mix concrete materials in appropriate drum-type batch machine mixer.

1. For mixer capacity of 1 cu. yd. or smaller, continue mixing at least 1-1/2 minutes, but not more than five minutes after ingredients are in mixer, before any part of batch is released.

2. For mixer capacity larger than 1 cu. yd., increase mixing time by 15 seconds for each additional 1 cu. yd.

C. Provide batch ticket for each batch discharged and used in the Work (both ready-mixed and site-mixed), indicating Project identification name and number, date, mixture type, mixture time, quantity, and amount of water added. Record approximate location of final deposit in structure.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Before placing concrete, verify that installation of concrete forms, accessories, reinforcement, and embedded items is complete and that required inspections have been performed.

1. The COR shall review and approve all preparation work before concrete is placed. Do not schedule ready-mixed concrete delivery until preparation work has been approved by the COR.

B. Do not proceed with concrete placement until all unsatisfactory conditions have been corrected.

3.2 PREPARATION OF SUBGRADE / SUBSTRATES

A. See requirements in other sections regarding compaction of subgrade soil materials.

CAST-IN-PLACE CONCRETE 033000 - 4

B. Locate and protect existing underground utilities as required to prevent damage.

1. In addition, install 2” foam insulation over underground utilities that run under exposed concrete. Create a compacted recess in the subgrade soil in this area to receive the foam insulation.

C. Grade existing subgrade material after clearing, excavating, and/or removal of existing constructions. Add granular fill material as needed to perfect subgrade.

1. Compact subgrade material until signs of settlement cease.

2. Place granular fill and/or required base material on compacted subgrade. Compact granular fill.

3. Nominal thickness of both base materials and concrete materials shown on plans drawings is the Minimum thickness. If localized variations in subgrade elevation exist, at no point shall base and/or concrete thickness be less than the nominal thickness.

4. Where concrete is to be placed against non-soil materials, prepare the substrate materials as appropriate. Substrates shall be clean, warm, saturated with potable water, prepared with bonding agent or bond breaker as indicated.

D. FORMING FOR CONCRETE PLACEMENT

1. Build forms and support form materials as required to create a uniform, flat, plumb/level finished concrete surface.

2. Where concrete will be exposed to weather in the final project condition (such as exterior slabs and sidewalks), form and finish the concrete such that it will drain.

3.3 CONCRETE REINFORCMENT

A. Install reinforcing in forms so as to be located as shown on the DRAWINGS.

1. At non-structural slab-on-grade elements, locate the reinforcement at the center of the concrete section.

B. Reinforcement supports:

1. Provide plastic chairs, concrete blocks, or other positive means to maintain reinforcing in the designated position during placement of concrete. (Placing/lifting/adjusting reinforcement elements while placing concrete is not allowed).

2. Reinforcing support materials shall be sound and not subject to rapid deterioration.

(Wood materials are not allowed).

3. Reinforcing support materials shall be saturated and above 50 degrees F at time of concrete placement.

C. Fabricate reinforcing to maintain 2” minimum of concrete cover between reinforcing steel and any soil surface.

CAST-IN-PLACE CONCRETE 033000 - 5

3.4 PLACEMENT OF CAST-IN-PLACE CONCRETE

A. Notify COR (48) business hours prior to commencement of concrete placement.

B. COR must review and approve all preparations for concrete placement before concrete is batched.

1. Coordinate the scheduling of the review of concrete preparations in advance with COR.

The COR may require advanced notice to assure availability to visit the site on the date and time desired.

2. Before requesting review by the COR, verify that installation of all formwork, vapor retarder, reinforcement, embedded items, etc. is complete.

C. Water addition in transit or at the Project site must be approved by the COR. Water addition must be in accordance with ASTM C94/C94M and must not exceed the permitted amount indicated on the concrete delivery ticket.

D. Deposit concrete continuously in one layer or in horizontal layers of such thickness that no new concrete is placed on concrete that has hardened enough to cause seams or planes of weakness.

E. Deposit and consolidate concrete for floors and slabs in a continuous operation, within limits of construction joints, until placement of a panel or section is complete.

F. Where concrete will be exposed to weather in the final project condition (such as exterior slabs and sidewalks), form and finish the concrete such that it will drain.

G. Broom Finish: Apply a medium broom finish to exterior concrete platforms, steps, ramps, and locations indicated on Drawings.

1. Immediately after float finishing, slightly roughen trafficked surface by brooming with a fiber-bristle broom perpendicular to main traffic route.

2. Coordinate required final finish with COR before application.

3.5 APPLICATION OF CONCRETE CURING

A. Commence initial curing immediately following finishing operations. Keep continuously moist at for at least 72 hours, using one of the following materials or methods.

B. Protect freshly placed concrete from premature drying and excessive cold or hot temperatures.

1. Comply with ACI 301 and ACI 306 for cold weather protection during curing.

a. Per ACI 306: Cold weather exists when the air temperature has fallen to, or is expected to fall to, below 40° F during the protection period. The protection period is defined as the time required to prevent concrete from being affected by exposure to cold weather.

2. Comply with ACI 301 and ACI 305.1 for hot-weather protection during curing.

C. Curing Unformed Surfaces: Comply with ACI 308.1 as follows:

1. Begin curing immediately after finishing concrete.

CAST-IN-PLACE CONCRETE 033000 - 6

2. Concrete Slabs/Floors:

a. Select from curing method options shown below:

1) Moisture-Retaining-Cover Curing: Cover concrete surfaces with moisture-retaining cover for curing concrete, placed in widest practicable width, with sides and ends lapped at least 12 inches, and sealed by waterproof tape or adhesive.

a) Immediately repair any holes or tears during curing period, using cover material and waterproof tape.

b) Cure for not less than seven days.

2) Ponding or Continuous Sprinkling of Water: Maintain concrete surfaces continuously wet for not less than seven days, utilizing one, or a combination of, the following not in cold weather:

a) Water.

b) Continuous water-fog spray.

3.6 INSTALLATION OF CONCRETE SURFACE REPAIRS

A. Defective Concrete:

1. For small concrete elements, remove and replace the entire element if concrete is defective.

2. For larger concrete elements,

a. defective areas might be allowed to be repaired and patched, subject to pre-approval by the COR.

b. If COR does not approve repair of defective areas, remove and replace full extents of the concrete element.

B. Patching Mortar: Mix dry-pack patching mortar, consisting of (1) part portland cement to (2- 1/2) parts fine aggregate passing a No. 16 sieve, using only enough water for handling and placing.

C. Repairing Unformed Surfaces:

1. Test unformed surfaces, such as floors and slabs, for finish, and verify surface tolerances specified for each surface.

a. Correct low and high areas.

b. Test surfaces sloped to drain for trueness of slope and smoothness; use a sloped template.

2. Repair finished surfaces containing surface defects, including spalls, popouts, honeycombs, rock pockets, crazing, and cracks in excess of 0.01 inch wide or that penetrate to reinforcement or completely through unreinforced sections regardless of width.

3. After concrete has cured at least 14 days, correct high areas by grinding.

4. Correct localized low areas during, or immediately after, completing surface-finishing operations by adding patching mortar.

CAST-IN-PLACE CONCRETE 033000 - 7

a. Finish repaired areas to blend into adjacent concrete.

5. Correct other low areas scheduled to remain exposed with repair topping.

a. Cut out low areas to ensure a minimum repair topping depth of 1/4 inch to match adjacent floor elevations.

b. Prepare, mix, and apply repair topping and primer in accordance with manufacturer's written instructions to produce a smooth, uniform, plane, and level surface.

6. Repair defective areas, except random cracks and single holes 1 inch or less in diameter, by cutting out and replacing with fresh concrete.

a. Remove defective areas with clean, square cuts, and expose steel reinforcement with at least a 3/4-inch clearance all around.

b. Dampen concrete surfaces in contact with patching concrete and apply bonding agent.

c. Mix patching concrete of same materials and mixture as original concrete, except without coarse aggregate.

d. Place, compact, and finish to blend with adjacent finished concrete.

e. Cure in same manner as adjacent concrete.

7. Repair random cracks and single holes 1 inch or less in diameter with patching mortar.

a. Groove top of cracks and cut out holes to sound concrete, and clean off dust, dirt, and loose particles.

b. Dampen cleaned concrete surfaces and apply bonding agent.

c. Place patching mortar before bonding agent has dried.

d. Compact patching mortar and finish to match adjacent concrete.

e. Keep patched area continuously moist for at least 72 hours.

D. Repair materials and installation not specified above may be used, subject to COR approval.

3.7 PROTECTION

A. Protect concrete surfaces from damage due to construction work.

B. Protect from petroleum stains.

C. Prohibit vehicles from interior concrete slabs.

D. Prohibit temporary placement of steel items on concrete surfaces.

END OF SECTION 033000

UNIT MASONRY 042000 - 1

SECTION 042000 - UNIT MASONRY

1.1 SUMMARY

A. Section Includes:

1. Concrete masonry units.

2. Mortar and grout.

3. Reinforcement.

4. Accessories.

1.2 ACTION SUBMITTALS

A. Product Data: For each type of product.

B. Shop Drawings: For reinforcing steel: Indicate bending, lap lengths, and placement of unit masonry reinforcing bars. Comply with ACI 315R.

C. Product information: For each type and color of: exposed masonry unit and mortar. Include info regarding color, texture, design strengths, mix design, etc. Testing of materials shall conform to applicable ASTM standards.

1.3 FIELD CONDITIONS

A. Cold-Weather Requirements: Do not use frozen materials or materials mixed or coated with ice or frost. Do not build on frozen substrates. Remove and replace unit masonry damaged by frost or by freezing conditions. Comply with cold-weather construction requirements contained in

TMS 602.

B. Hot-Weather Requirements: Comply with hot-weather construction requirements contained in

TMS 602.

PART 2 - PRODUCTS

2.1 UNIT MASONRY, GENERAL

A. Masonry Standard: Comply with TMS 602, except as modified by requirements in the Contract Documents.

B. Defective Units: Referenced masonry unit standards may allow a certain percentage of units to contain chips, cracks, or other defects exceeding limits stated. Do not use units where such defects are exposed in the completed Work.

UNIT MASONRY 042000 - 2

2.2 CONCRETE MASONRY UNITS

A. Shapes: Provide shapes indicated and as follows, with exposed surfaces matching exposed faces of adjacent units unless otherwise indicated.

1. Provide special shapes for lintels, corners, jambs, sashes, movement joints, headers, bonding, and other special conditions.

B. CMUs and Decorative CMUs: ASTM C90, Normal or Medium weight.

1. Unit Compressive Strength: Provide units with minimum average net-area compressive strength of 2000 psi minimuim.

2. Size: Standard 8” width, 16” length, 8” height typical

3. Decorative Block

a. Pattern and Texture: For all block above finished grade and as shown on drawings:

Standard pattern, split-face finish (verify with CO)

b. Color: Tan (verify with CO)

2.3 MORTAR AND GROUT MATERIALS

A. Portland Cement: ASTM C150/C150M, Type I or II, except Type III may be used for cold-weather construction. Provide natural color or white cement as required to produce mortar color indicated.

1. Alkali content will not be more than 0.1 percent when tested in accordance with

ASTM C114.

B. Hydrated Lime: ASTM C207, Type S.

C. Portland Cement-Lime Mix: Packaged blend of portland cement and hydrated lime containing no other ingredients.

D. Masonry Cement: ASTM C91/C91M.

E. Mortar Pigments: Natural and synthetic iron oxides and chromium oxides, compounded for use in mortar mixes and complying with ASTM C979/C979M. Use only pigments with a record of satisfactory performance in masonry mortar.

F. Aggregate for Mortar: ASTM C144.

1. For mortar that is exposed to view, use washed aggregate consisting of natural sand or crushed stone.

2. For joints less than 1/4 inch (6.4 mm) thick, use aggregate graded with 100 percent passing the No. 16 (1.18-mm) sieve.

G. Aggregate for Grout: ASTM C404.

H. Cold-Weather Admixture: Nonchloride, noncorrosive, accelerating admixture complying with ASTM C494/C494M, Type C; and/or ASTM C1384, and recommended by manufacturer for use in masonry mortar of composition indicated.

UNIT MASONRY 042000 - 3

I. Water: Potable.

2.4 MORTAR AND GROUT MIXES

A. General: Do not use admixtures, including pigments, air-entraining agents, accelerators, retarders, water-repellent agents, antifreeze compounds, or other admixtures unless otherwise indicated.

1. Do not use calcium chloride in mortar or grout.

2. Use portland cement-lime mortar unless otherwise indicated.

3. Add cold-weather admixture (if used) at same rate for all mortar that will be exposed to view, regardless of weather conditions, to ensure that mortar color is consistent.

B. Preblended, Dry Mortar Mix: Furnish dry mortar ingredients in form of a preblended mix.

Measure quantities by weight to ensure accurate proportions, and thoroughly blend ingredients before delivering to Project site.

C. Mortar for Unit Masonry: Comply with ASTM C270, Proportion Specification. Provide the following types of mortar for applications stated unless another type is indicated.

1. For all masonry: use Type S unless noted otherwise.

D. Pigmented Mortar:

1. Below grade: use standard unpigmented mortar

2. Above grade: Use colored cement product to match color of split-faced block supplied

E. Grout for Unit Masonry: Comply with ASTM C476.

1. Use grout of type indicated or, if not otherwise indicated, of type (fine or coarse) that will comply with TMS 602 for dimensions of grout spaces and pour height.

2. Proportion grout in accordance with ASTM C476, for specified 28-day compressive strength indicated, but not less than 2000 psi.

3. Provide grout with a slump of 8 to 11 inches as measured in accordance with

ASTM C143/C143M.

2.5 REINFORCEMENT

A. Uncoated-Steel Reinforcing Bars: ASTM A615/A615M or ASTM A996/A996M, Grade 60.

B. Masonry-Joint Reinforcement, General: ASTM A951/A951M.

1. Exterior Walls: Hot-dip galvanized carbon steel.

2. Wire Size for Side Rods: 0.148-inch diameter.

3. Wire Size for Cross Rods: 0.148-inch diameter.

4. Spacing of Cross Rods, Tabs, and Cross Ties: Not more than 16 inches o.c.

5. Provide in lengths of not less than 10 ft., with prefabricated corner and tee units.

C. Masonry-Joint Reinforcement for Single-Wythe Masonry: Ladder-type with single pair of side rods.

UNIT MASONRY 042000 - 4

2.6 ACCESSORIES

A. Crawlspace Vents: Manufactured vent units designed to be used with masonry walls;

1. nominal 8” x 16” vents; net free vent area of 57 sq. inches min. per unit

2. with automatic louvers that close in temperatures below 40 degrees F;

3. integral insect and rodent resistant screen

4. face grille removable/replaceable from outside of structure

5. Model FVRABL by GAF Master Flow or equal

PART 3 - EXECUTION

3.1 INSTALLATION, GENERAL

A. Use full-size units without cutting if possible. If cutting is required to provide a continuous pattern or to fit adjoining construction, cut units with motor-driven saws; provide clean, sharp, unchipped edges. Allow units to dry before laying unless wetting of units is specified. Install cut units with cut surfaces and, where possible, cut edges concealed.

B. Select and arrange units for exposed unit masonry to produce a uniform blend of colors and textures. Mix units from several pallets or cubes as they are placed.

3.2 TOLERANCES

A. Lines and Levels:

1. For bed joints and top surfaces of bearing walls, do not vary from level by more than 1/4 inch in 10 ft., or 1/2-inch maximum.

2. For conspicuous horizontal lines, such as lintels, sills, parapets, and reveals, do not vary from level by more than 1/8 inch in 10 ft., or 1/2-inch maximum.

3. For vertical lines and surfaces, do not vary from plumb by more than 1/4 inch in 10 ft., or 1/2-inch (13-mm) maximum.

4. For conspicuous vertical lines, such as external corners, door jambs, reveals, and expansion and control joints, do not vary from plumb by more than 1/8 inch in 10 ft., or 1/2-inch maximum.

5. For lines and surfaces, do not vary from straight by more than 1/4 inch in 10 ft, or 1/2-inch (13-mm) maximum.

6. For vertical alignment of exposed head joints, do not vary from plumb by more than 1/4 inch in 10 ft, or 1/2-inch (13-mm) maximum.

B. Joints:

1. For bed joints, do not vary from thickness indicated by more than plus or minus 1/8 inch, with a maximum thickness limited to 1/2 inch.

2. For head and collar joints, do not vary from thickness indicated by more than plus 3/8 inch or minus 1/4 inch.

3. For exposed head joints, do not vary from thickness indicated by more than plus or minus 1/8 inch.

UNIT MASONRY 042000 - 5

3.3 LAYING MASONRY WALLS

A. Lay out walls in advance for accurate spacing of surface bond patterns with uniform joint thicknesses and for accurate location of openings, movement-type joints, returns, and offsets.

Avoid using less-than-half-size units, particularly at corners, jambs, and, where possible, at other locations.

1. Account for installation of accessories (e.g. vents) at time of initial layout

B. Bond Pattern for Exposed Masonry: Unless otherwise indicated, lay exposed masonry in running bond; do not use units with less-than-nominal 4-inch horizontal face dimensions at corners or jambs.

C. Built-in Work: As construction progresses, build in items specified in this and other Sections. Fill in solidly with masonry around built-in items.

D. Fill space between steel frames (vent units) and masonry solidly with mortar unless otherwise indicated.

E. Fill cores in hollow CMUs with grout 24 inches under bearing plates, beams, lintels, posts, and similar items unless otherwise indicated.

3.4 MORTAR BEDDING AND JOINTING

A. Lay CMUs as follows:

1. Bed face shells in mortar and make head joints of depth equal to bed joints.

2. Bed webs in mortar in all courses of piers, columns, and pilasters.

3. Bed webs in mortar in grouted masonry, including starting course on footings.

4. Fully bed entire units, including areas under cells, at starting course on footings where cells are not grouted.

5. Fully bed units and fill cells with mortar at anchors and ties as needed to fully embed anchors and ties in mortar.

B. Lay solid masonry units with completely filled bed and head joints; butter ends with sufficient mortar to fill head joints and shove into place. Do not deeply furrow bed joints or slush head joints.

C. Tool exposed joints slightly concave when thumbprint hard, using a jointer larger than joint thickness unless otherwise indicated.

3.5 MASONRY-JOINT REINFORCEMENT

A. General: Install entire length of longitudinal side rods in mortar with a minimum cover of 5/8 inch on exterior side of walls, 1/2 inch elsewhere. Lap reinforcement a minimum of 6 inches.

1. Space reinforcement not more than 16 inches o.c.

2. Provide reinforcement not more than 8 inches above and below wall openings and extending 12 inches beyond openings in addition to continuous reinforcement.

UNIT MASONRY 042000 - 6

B. Interrupt joint reinforcement at control and expansion joints unless otherwise indicated.

C. Provide continuity at wall intersections by using prefabricated T-shaped units.

D. Provide continuity at corners by using prefabricated L-shaped units.

3.6 REINFORCED UNIT MASONRY

A. Placing Reinforcement: Comply with requirements in TMS 602.

B. Grouting: Do not place grout until entire height of masonry to be grouted has attained enough strength to resist grout pressure.

1. Comply with requirements in TMS 602 for cleanouts and for grout placement, including minimum grout space and maximum pour height.

3.7 CLEANING

A. In-Progress Cleaning: Clean unit masonry as work progresses by dry brushing to remove mortar fins and smears before tooling joints.

B. Final Cleaning: After mortar is thoroughly set and cured, clean exposed masonry as follows:

1. Remove large mortar particles by hand with wooden paddles and nonmetallic scrape hoes or chisels.

2. Test cleaning methods on sample wall panel; leave one-half of panel uncleaned for comparison purposes. Obtain Architect's approval of sample cleaning before proceeding with cleaning of masonry.

3. Clean brick by bucket-and-brush hand-cleaning method described in BIA Technical Notes 20.

4. Clean concrete masonry by applicable cleaning methods indicated in NCMA TEK 8-4A.

3.8 INSTALLATION OF ACCESSORIES

A. Crawl Space Vents:

1. Install per manufacturer’s instructions

2. Provide foam backer rod, gasket, sealant, etc. as required to assure a water tight and insect-proof seal between face of vent unit and face of CMU.

3. After installation: Assure louvers are free moving with temperature changes (not binding)

3.9 MASONRY WASTE DISPOSAL

A. Waste Disposal as Fill Material: Dispose of reasonable quantities of clean masonry waste, including excess or soil-contaminated sand, waste mortar, and broken masonry units, by crushing and mixing with fill material as fill is placed.

1. Type and quantity of masonry waste to be disposed as fill is subject to review and approval by the CO before backfilling begins.

UNIT MASONRY 042000 - 7

2. Do not dispose of masonry waste as fill within 18 inches of finished grade.

B. Masonry Waste Recycling: Return broken CMUs not used as fill to manufacturer for recycling.

C. Excess Masonry Waste: Remove excess clean masonry waste that cannot be used as fill, as described above or recycled, and other masonry waste, and legally dispose of off Owner's property.

END OF SECTION 042000

Seagull Guard Station – Bunkhouse Replacement Project

FABRICATED STRUCTURES 133423 - 1

SECTION 133423 - FABRICATED STRUCTURES

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes prefabricated crew quarters building to be delivered and installed on site for a fully functional facility.

1. If a conventional stick-built method is preferred in lieu of prefabrication for the crew quarters building, refer also to this section for requirements for the building.

B. Section also includes related requirements for the Crawlspace foundation on which the building will be set or constructed.

C. Related Sections:

1. Section 042000 – Unit Masonry

2. Section 220100 – Building Plumbing

3. Section 221100 – Water Distribution System

4. Section 221313 – On-Site Septic System

5. Section 230500 – Basic HVAC Materials & Methods

6. Section 260500 – Basic Electrical Materials & Methods

7. Section 270000 – Generic Telecommunications Cabling

1.2 DEFINITIONS

A. “Crew Quarters” and “Bunkhouse” are used interchangeably in this section and refer to the new building structure – separate from grading, landscaping, site utilities, and other required site work detailed in the contract documents.

B. Note the abbreviation “CO” may mean Contracting Officer or carbon monoxide depending on the context of use.

1.3 REGULATORY REQUIREMENTS

A. The USDA Forest Service is the Authority Having Jurisdiction (AHJ) for this project location.

Applicable codes may differ from local state codes. While it is impractical to cite all required codes, specific major codes and standards are identified here for technical uniformity. The latest code editions shall apply to all new designs for which construction has not begun. When overlap occurs in cited standards and codes, the more protective applies.

B. 2024 ICC Codes (International Code Council), including but not limited to:

1. 2024 IBC (International Building Code)

2. 2024 IECC (International Energy Conservation Code) – Residential Provisions

3. 2024 IMC (International Mechanical Code)

4. 2024 IPC (International Plumbing Code)

5. 2024 IFGC (International Fuel Gas Code)

6. 2024 IFC (International Fire Code)

FABRICATED STRUCTURES 133423 - 2

7. 2024 IWUIC (International Wildland-Urban Interface Code)

C. Latest editions of NFPA Codes (National Fire Protection Association), including but not limited to:

1. 2024 NFPA 101 – Life Safety Code

2. 2023 NFPA 70 – National Electrical Code (NEC)

3. 2024 NFPA 1 – Fire Code

4. 2022 NFPA 10 – Standard for Portable Fire Extinguishers

5. 2025 NFPA 72 – National Fire Alarm and Signaling Code

D. 2015 ABAAS (Architectural Barriers Act Accessibility Standards)

E. Minnesota State technical requirements where noted or applicable. (Administrative requirements do not apply).

F. ASCE 7 Minimum Design Loads and Associated Criteria for Building and Other Structures

1.4 PERFORMANCE REQUIREMENTS

A. General:

1. Provide a complete, integrated set of mutually dependent components that form a completely assembled and functional crew quarters building on the Project site.

2. If a prefabrication method is preferred, fabricate crew quarters building in an enclosed factory.

B. Structural Performance:

1. Crew Quarters building shall withstand the effects of gravity loads and the loads and stresses within limits and under conditions indicated according to all applicable codes – including but not limited to ASCE 7, 2024 IBC, and Minnesota state codes and standards applicable to the project location.

C. Energy Performance:

1. Meet or exceed requirements in the Residential Provisions of 2024 IECC; ASHRAE 55-

2023 Thermal Environmental Conditions for Human Occupancy; and ASHRAE 62.2-2022 Ventilation and Acceptable Indoor Air Quality in Residential Buildings.

D. Winterization:

1. The Crew Quarters building is drained, winterized, and shut down every year during the winter months (approx. November through March). Materials and equipment selections shall include durability for this condition. Operation & Maintenance manuals, materials, and training shall include winterizing information for optimizing the longevity of materials and equipment.

2. The Crew Quarters building is expected to be minimally heated during the winter months (approx. November through March).

E. Fire Protection: An automatic sprinkler system is not required. The USDA Forest Service has approved a building code variance allowing an exception to the residential sprinkler requirement.

In lieu of an automatic sprinkler system, the following life safety equivalencies must be provided:

1. Hard-wired automatic smoke alarms in accordance with 2024 IBC Section 420.5 and 2025

NFPA 72.

FABRICATED STRUCTURES 133423 - 3

2. Hard-wired automatic carbon monoxide alarms in accordance with 2024 IBC Sections

420.5 and 915, and 2025 NFPA 72.

3. Portable fire extinguishers in accordance with 2022 NFPA 10 at the locations shown on the Fire Extinguisher Floor Plan.

4. See Appendix attachment titled “Forest Service Petition For Building Code Variance,” dated Wednesday, February 5, 2025. Topic: Superior National Forest Seagull Guard Station Crew Quarters – Automatic Sprinkler System Building Code Variance. Approved by R9 Director of Engineering 2/07/2025.

F. Indoor Air Quality:

1. All building products shall be of low-emitting materials.

2. No smoking inside or within 25' of the building.

G. Water Tightness: Provide flashing and sealant details around all exterior doors, windows, and building joints to verify the building is watertight.

H. Rodent Proofing: Meet or exceed requirements in 2024 IBC Appendix F Rodentproofing.

I. Radon Control: Provide radon control design features as required by all applicable codes – including Minnesota state codes and standards applicable to the project location.

J. General Aesthetics:

1. To the extent practical for materials and product selections, the Crew Quarters building shall incorporate principles of sustainability and reflect the natural and cultural setting of its location.

2. Reference: Built Environment Image Guide (BEIG), published by the USDA Forest Service in 2001.

1.5 PREINSTALLATION MEETINGS

A. Conduct preinstallation conferences virtually or on-site as designated by the Contracting Officer.

Review methods and procedures related to, but not limited to, the following:

1. Processes, responsibilities, and coordination for the prefabrication manufacturing process, including recommendations for design modifications to better optimize efficiencies and best practices in the prefabricator’s manufacturing setting. Or processes, responsibilities, and coordination for a stick-built construction if preferred.

2. Coordination of foundations and other preparatory work performed by other trades.

3. Coordination of transportation and sequences for installation of prefabricated building on site.

4. Required reviews, tests, inspections, and certifications.

5. Construction schedules. Verify availability of materials, personnel, equipment, and facilities needed to make progress and avoid delays. Identify unfavorable weather and forecasted weather conditions and impact on schedules.

1.6 SUBMITTALS

A. Product Data: For each type of product indicated.

FABRICATED STRUCTURES 133423 - 4

B. Shop Drawings: Submit final drawings for either prefabricated or stick-built Crew Quarters building to the Contracting Officer for approval before beginning any building-related work.

Include full building plans, elevations, sections, details, partitions, and attachments to other work.

Structural drawings and structural analysis data shall be signed and sealed by the qualified professional engineer responsible for their preparation. Building and building systems requiring design by a qualified professional engineer or designer shall be signed and sealed by a qualified professional engineer or designer.

C. Samples: For flooring, wall & ceiling finishes, cabinetry, roof shingles, siding, and any factory-applied finishes and field-applied finishes.

D. Door hardware keying schedule.

E. Maintenance data.

F. Warranties.

1.7 QUALITY ASSURANCE

A. Manufacturer Qualifications: Shall have constructed several similar buildings in northern Minnesota.

B. Electrical Components, Devices, and Accessories: Listed and labeled as defined in 2023 NFPA 70 National Electrical Code (NEC), by a qualified testing agency, and marked for intended location and application.

C. Licensed Professionals: Building and building systems requiring design by a qualified professional engineer or designer shall be licensed in the State of Minnesota, including but not limited to structural systems.

1.8 WARRANTY

A. General Warranty: The Contractor shall warrant all supplies, materials, equipment, and all associated work performed under the Contract for a period of 1 year from the date of final acceptance of work, in accordance with the requirements of the Federal Acquisition Regulation (FAR), including but not limited to FAR Clause 52.246-21, Warranty of Construction.

B. Special Warranty: The Contractor shall exercise all Manufacturers' Warranties on behalf of the Government. The Contractor shall provide products and equipment meeting, or exceeding, the Warranty periods specified below. Warranty periods are from the date of Substantial Completion unless otherwise indicated. The Contractor shall provide copies of all executed Manufacturer Warranties to the Government prior to final acceptance.

1. Shingles: 5 year non prorated, 30 year total.

2. Siding: Manufacturer's standard Warranty for brand and model specified.

3. Furnace burner/heat exchanger: 10 years.

4. Air conditioning unit: 10 years on parts.

5. Water heaters: 10 years on the heat exchanger and 3 years on parts.

6. Exterior Paints: 10 years.

7. Plastic Laminates: 5 years.

FABRICATED STRUCTURES 133423 - 5

8. Solid Surface: 10 years

9. Windows: Manufacturer's standard Warranty for the brand and model specified.

10. Flooring: Manufacturer's standard Warranty for the brand and model specified.

11. Fiberglass Doors: 15 years, Manufacturer’s standard Warranty against failure due to corrosion from specified environment.

12. Door Hardware: Minimum 3 years, Manufacturer agrees to repair or replace components of door hardware that fail in materials or workmanship within specified warranty period.

13. Door Closers: 10 years

PART 2 - PRODUCTS

2.1 MATERIALS

A. Steel Plates, Shapes, and Bars: ASTM A 36.

B. Zinc-Coated (Galvanized) Steel: Hot-dip galvanized according to ASTM A 123.

C. Plywood: DOC PS 1, Exposure 1 not less than 1/2-inch nominal thickness.

D. Particleboard: ANSI A208. l, Grade M-2.

E. Anchorages: Anchor bolts; hot-dip galvanized according to ASTM A 153/A 153M or

ASTMF2329.

F. Dimension Lumber: Spruce/Pine/Fir No. 2 or better with maximum moisture content of 19%.

2.2 PREFABRICATED CREW QUARTERS BUILDING

A. General:

1. All materials/products and associated installation materials/products shall be stored and installed in ambient temperature ranges, moisture conditions, and other conditions recommended by the manufacturer.

2. All substrates and materials/products shall be prepared and installed according to manufacturer specifications and recommendations.

B. Crawl space foundation materials/accessories (also see Related Spec Sections & Drawings):

1. Hatchway ladder for access to crawlspace.

a. Fixed access ladder rated to OSHA Type IA

b. Provide method of support under ladder legs to provide stability and protect crawlspace vapor barrier integrity

2. Continuous Class I vapor retarder, overlapped and taped for continuity.

a. Vapor barrier shall be 20-mil minimum thickness, designed for use in crawlspaces

b. Tape and sealants per manufacturer instructions to provide vapor-proof installation

3. Unit Dehumidifiers for Crawlspace.

a. See Section 230500 for information and requirements

4. Sump Basins

a. Solid (not perforated); polyethylene construction

b. Lid from same manufacturer, intended for use with basin provided.

FABRICATED STRUCTURES 133423 - 6

c. Stainless steel hardware as required to fasten lid to basin.

5. Mechanical Ventilation in Crawlspace: Per IBC 1202.4.3, continuously operated mechanical ventilation shall be provided at a rate of 45 CFM (1.0 CFM per 50 sq. ft. of crawl space ground surface).

C. Floor Joists:

1. Floor joists shall be select structural No 2 or better hem-fir. Include a 16' section of ground contact treated timber joist, centered on each doorway. Wood Preservative Treated Lumber shall comply with the American Wood Preservers' Association Use Category System; 3B for above ground exterior use and 4A for ground contact.

D. Thermal and Moisture Protection (Div 07):

1. Insulation: Owens Corning, Knauf, Johns Manville, Dow, CertainTeed, Rockwool, or equal.

a. All insulation shall be unfaced. Install as indicated on the Drawings.

b. Rigid Insulation for Above-Grade Exterior Walls: Extruded polystyrene (XPS), 1.5”, R-7.5; or Mineral wool rigid board, 1.5”, R-6.3. DO NOT TAPE JOINTS.

c. Rigid Insulation for Crawlspace and Exterior Ground: Extruded polystyrene (XPS), two layers 2”, total minimum R-20. TAPE ALL JOINTS.

d. Batt Insulation: Fiberglass batt, both exterior walls and interior acoustical walls.

e. Spray Foam: Spray polyurethane foam insulation, ASTM C1029, Type II, closed cell, with maximum flame-spread and smoke developed indexes of 75 and 450, respectively, per ASTM E84.

2. Vapor Retarder: Shall be Class I, permeance rating of 0.1 perms or less. Minimum 15-mil polyethylene.

3. Housewrap: Shall be vapor open water-resistive barrier. Tyvek or equal.

4. Asphalt Shingles: GAF Timberline Cool Roof shingles 30 year, or equal. Light brown color.

a. Provide samples of manufacturer’s range of colors. Final color to be selected by

Contracting Officer.

b. Exterior Fire-Test Exposure: Provide asphalt shingles and related roofing materials identical to those of assemblies tested for Class A fire resistance in accordance with ASTM E108 or UL 790 by Underwriters Laboratories or another testing and inspecting agency acceptable to authorities having jurisdiction. Identify products with appropriate markings of applicable testing agency.

c. Wind Resistance: Provide asphalt shingles that comply with requirements of ASTM D3161/D3161M, Class F, and with ASTM D7158/D7158M, Class H.

d. Energy Performance, ENERGY STAR: Provide asphalt shingles that are listed on the DOE's "ENERGY STAR Roof Product List" for steep-slope roof products.

e. Install ice & water shield membrane underlayment throughout entire roof.

f. Install continuous ridge vent.

g. Include all necessary metal flashing and trim.

h. Install asphalt shingles and metal flashings in accordance with manufacturer's written instructions and recommendations in ARMA's "Asphalt Roofing Residential Manual - Design and Application Methods" and NRCA's "NRCA Guidelines for Asphalt Shingle Roof Systems."

FABRICATED STRUCTURES 133423 - 7

i. Furnish extra materials for Owner’s maintenance stock that match products installed and that are packaged with protective covering for storage…