FS supplemental specifications.pdf

USDA FOREST SERVICE, R-1

SLATE CREEK ROOFING

SLATE CREEK ROOFING SECTION 00050

FOREST SERVICE SUPPLEMENTAL SPECIFICATIONS

SECTION 000050 – SLATE CREEK ROOFING

1.1 GENERAL

This item shall consist of installing a new roof on the Slate Creek middle residence, bunkhouse and duplex on the Nez Perce-Clearwater National Forests, on the Salmon River Ranger District. Work includes but is not limited to removing/replacing roofing, repairing sub roof assemblies, installing weather proofing and water barriers, removal and reinstallation of gutters, repair/replacement of facia, painting. As a significant historical resource(s) it is imperative that maintenance activities DO NOT ADVERSELY AFFECT the historical integrity of the structures. Accordingly, all materials or replacement materials used for maintenance must be “in kind” (e.g. use of original wall and trim paint colors, replacement with matching style trim and wall boards, etc.). If there are any questions about acceptable materials or techniques to be used, please contact the CO.

Any and all excess materials and property paid for will be retained by the Forest Service.

Arranging a storage location for excess material will be at the discretion of the Contracting Officer.

The project is located at Slate Creek Ranger Station, this site is accessible year around.

The project includes a residential house with options for the bunkhouse and duplex.

Sub roof assemblies may not require repair and are not guaranteed quantities.

A. Transportation: The Contractor shall provide adequate and safe methods for trucking and transporting equipment and materials onto and off the projects sites. All Local, State, and federal regulations and laws shall be complied with by the Contractor during trucking and transporting operations on Local, County, State, and Forest roads.

B. Clean substrate of any projections and substances detrimental to roofing work.

C. Proceed with installation of underlayment and roofing materials only when weather conditions are in compliance with manufacturer’s recommendations and when substrate is completely dry.

1.2 DEMOLITION OF EXISTING ROOF

Temporary Protection: Maintain integrity of attic enclosures keeping all openings, holes, joints, and gaps sealed to prevent entry from bats or other wildlife. Erect temporary protection, such as walks, fences, railings, and canopies, where required to protect residents of the buildings.

1. Provide protection to ensure safe passage of people around building demolition area to and from occupied portions of adjacent buildings and structures, in accordance with Federal OSHA requirements.

2. Warning Signs and Labels: Provide warning signs at all approaches and doors to the work areas. Locate signs at such a distance that personnel may read the sign and take the necessary protective steps required before entering the area. Warning signs may be in the form of continuous plastic tape. At a minimum signs should read

WARNING

DO NOT ENTER

ROOFING WORK

Alternate wording for the warning signs will be approved by the Contracting Officer.

1.3 DIMENSIONS FIELD VERIFICATION

A. Field verify all dimensions affecting the work of this contract prior to ordering materials. All dimensions shown on the drawings are estimated base on old plans and AutoCAD Drawing field verification is required.

1.4 GUARANTEE

A. Furnish a product guarantee-warranty in writing against a defective roofing materials for at least 10 years from date of acceptance.

1.5 Measurement and Payment - Measurement and payment for contract work will be made only for and under those pay items included in the SCHEDULE OF ITEMS. All other work, labor, materials, equipment, and incidentals necessary to successfully complete the project will be considered as included in the payment for items shown.

A. When more than one class, size, type, thickness, etc. is specified in the Schedule of Items for any pay item, suffixes will be added to the item number to differentiate between the pay items.

B. Payment shall be by units defined and determined according to U.S. Standard measure and by the following:

1. Linear Foot (LF): Measurement of work along its length from point-to-point;

parallel to the base or foundation. Do not measure overlaps.

2. Lump Sum (LSQ): One complete unit.

3. Square Foot (SF): Measured on a plane parallel to the surface being measured.

C. Method of measurement: One of the following methods of measurement for determining final payment is designated on the Schedule of Items for each pay item:

1. ACTUAL QUANTITIES (AQ) - These quantities are determined from actual measurements of completed work.

2. DESIGNED QUANTITIES (DQ) - These quantities denote the final number or units to be paid for under the terms of the contract. They are based upon the original design data available prior to advertising the project. Original design data include the preliminary survey information, design assumptions, calculations, drawings, and the presentation in the contract. Changes in the number of units shown in the Schedule of Items may be authorized under any of the following conditions:

• As a result of changes in the work authorized by the CO.

• As a result of the CO determining that errors exist in the original design that cause a pay item quantity to change by 15 percent or more.

• As a result of the Contractor submitting to the CO a written request showing evidence of errors in the original design that cause a pay item quantity to change by 15 percent or more. The evidence must be verifiable and consist of calculations, drawings, or other data that show how the designed quantity is believed to be in error.

3. LUMP SUM QUANTITIES (LSQ) - These quantities denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job. They shall not be measured.

1.6 All Submittals - It will be the Contractor's responsibility to submit information on all items required with such promptness as to cause no delay in the work. Approvals must be obtained before starting work on parts of the project which involves the submittal.

Contractor shall allow 10 calendar days for processing of submittals by the Government.

A. Submit four copies of submittals and shop drawings to the Contracting Officer for approval on the items required herein. Circle or check items to be used on submittals. Highlighter pens may print black over writing or may not show up at all when copied and should not be used. One copy of all submittals and shop drawings will be returned to the contractor. Information must be adequate to determine compliance with specifications.

B. Substitution - Materials in the specifications may be followed by the words "or approved equal." In these cases, wherever the name or brand of a manufacturer's article is specified, it is used as a measure of quality and utility or a standard. If the Contractor prefers to use any other brand or manufacturer of same quality, appearance and utility to that specified, he shall request substitution as provided below, not less than 10 days before the planned installation of the item. The

Contracting Officer will approve or disapprove the request for substitution and his decision shall be final. Unless substitutions are requested within the time stated above and as provided below, no deviation from the specifications will be allowed.

Requests for substitutions will only be considered if contractor submits the following:

1. Complete technical data including drawings, complete performance specifications, test data, samples and performance tests of the article proposed for substitution. Submit additional information if required by Contracting Officer. All items in the above information shall be circled, tagged, or marked in some way to indicate all deviations or differences which the proposed item differs from the originally specified item.

2. Similar data as specified for item originally identified in the contract. All items shall be marked to identify where/how the proposed substitution will differ and how it meets sailient requirements.

3. A statement by the Contractor that the proposed substitution is in full compliance with the contract documents, applicable codes, and laws; and that the Contractor takes on the responsiblity for any effect upon related work in the project for any substitution and shall pay any additional costs generated by any substitutions.

1.7 Related Work - The work shall be in accordance with these specifications. The following is a list of the specifications that are included with this package.

SECTION 000050 – SLATE CREEK RESIDENCE, BUNKHOUSE, & DUPLEX ROOFING

SECTION 001900 – MOBILIZATION

SECTION 024119 – SELECTIVE DEMOLITION

SECTION 07311_02–ASPHALT ROOFING

SECTION 07720_02–ROOF ACCESSORIES

SECTION 074113-3–ROUGH CARPENTRY

END OF SECTION

February 2025

SECTION 001900 - MOBILIZATION

PART I - GENERAL

1.1 Mobilization - This item is intended to compensate the Contractor for operations including, but not limited to, those necessary for the movement of personnel, equipment, supplies, and incidentals to the project site; for payment of premiums for bonds and insurance for the project; and for any other work and operations which must be performed or costs that must be incurred incident to the initiation of meaningful work at the site and for which payment is not otherwise provided for under the contract.

1.2 Method of Measurement - The measurement shall be lump sum for mobilization.

1.3 Basis of Payment - The lump sum price shall include full compensation for mobilization.

Progress payments for mobilization will be made as follows:

A. Bond premiums will be reimbursed after receipt of the evidence of payment.

B. 50% of the lump sum, not to exceed 5% of the original contract amount, will be paid following completion of 5% of the original contract amount not including mobilization and bond premiums.

C. Payment of the remaining portion of the lump sum, up to 10% of the original contract amount, will be paid following completion of 10% of the original contract amount not including mobilization and bond premiums.

D. Any portion of the lump sum in excess of 10% of the original contract amount will be paid after final acceptance.

Progress payments for mobilization and preparatory work shall be subject to retainage.

PART II - PRODUCTS (Not Applicable)

PART III - EXECUTION (Not Applicable)

February 2017

SECTION 07311 ASPHALT SHINGLES

PART 1 – GENERAL

RELATED DOCUMENTS

Drawings and general provisions of the Contract, including General Conditions and Division 1 Specification Sections, apply to this Section.

SUMMARY

This Section includes the following:

Asphalt shingles.

Ridge vents Felt underlayment.

Self-adhering sheet underlayment.

Related Sections include the following:

Section 074113-3 “Rough Carpentry” for roof deck wood structural panels.

DEFINITIONS

Roofing Terminology: Refer to ASTM D 1079 and glossary of NRCA’s “The NRCA Roofing and Waterproofing Manual” for definitions of terms related to roofing work in this Section.

SUBMITTALS

Product Data: For each product indicated.

Samples for Initial Selection: For each type of asphalt shingles and ridge cap shingles.

Include similar trim samples and accessories involving color selection.

Samples for verification: For the following products, of sizes indicated, to verify color selected.

Asphalt Shingle: Full-size asphalt shingle strip.

Ridge and Hip Cap Shingles: Full-size ridge and hip cap asphalt shingle.

Ridge vent: 12 inch (300 mm) long Sample.

Exposed valley lining: 12 inches (300 mm).

Felt underlayment – product data.

Self-Adhering Underlayment - product data.

Product Test Reports: Based on evaluation of comprehensive tests performed by a qualified testing agency or by manufacturer and witnessed by a qualified testing agency, for asphalt shingles.

Maintenance Data: For asphalt shingles to include in maintenance manuals.

Warranties: Special warranties specified in this Section.

QUALITY ASSURANCE

Source Limitations: Obtain asphalt shingles and ridge and hip cap shingles through one source and from a single asphalt shingle manufacturer.

Fire-Test-Response Characteristics: Provide asphalt shingle and related roofing materials with the fire-test-response characteristics indicated, as determined by testing identical products per test method below by UL or another testing and inspecting agency acceptable to authorities having jurisdiction. Identify materials with appropriate markings of applicable testing and inspecting agency.

Exterior Fire-Test Exposure: Class A; ASTM E 108 or UL 790, for application and roof slopes indicated.

DELIVERY, STORAGE, AND HANDLING

Store roofing materials in a dry, well-ventilated, weathertight location according to asphalt shingle manufacturer’s written instructions. Store underlayment rolls on end on pallets or other raised surfaces. Do not double-stack rolls.

Handle, store, and place roofing materials in a manner to avoid significant or permanent damage to roof deck or structural supporting members.

Protect unused underlayment from weather, sunlight, and moisture when left overnight or when roofing work is not in progress.

PROJECT CONDITIONS

Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit asphalt shingle roofing to be performed according to manufacturers’ written instructions and warranty requirements.

WARRANTY

Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace asphalt shingles that fail in materials or workmanship within specified warranty period. Materials failures include manufacturing defects and failure of asphalt shingles to self-seal after a reasonable time.

Material Warranty Period: 25 years from date of Substantial Completion, prorated, with first 3 years nonprorated.

Wind-Speed Warranty Period: Asphalt shingles will resist blow-off or damage caused by wind speeds up to 100 mph (36 m/s) for 15 years from date of Substantial Completion.

Algae-Discoloration Warranty Period: Asphalt shingles will not discolor 10 years from date of Substantial Completion.

EXTRA MATERIALS

Furnish extra materials described below that match products installed, packaged with protective covering for storage, and are identified with labels describing contents.

Asphalt Shingles: One 100 sq. ft (9.3 sq. m) of each type, in unbroken bundles for the entire project.

PART 2 - PRODUCTS

MANUFACTURERS

In other Part 2 articles where titles below introduce lists, the following requirements apply to product selection:

Available Products: Subject to compliance with requirements, products that may be incorporated into the Work include, but are not limited to, products specified.

GLASS-FIBER-REINFORCED ASPHALT SHINGLES

Multitab-Strip Asphalt Shingles: ASTM D 3462, glass-fiber reinforced, mineral-granule surfaced, and self-sealing.

Tab Arrangement: Three tab, regularly spaced Cutout Shape: Square.

Butt Edge: Stagger cut.

Fire resistance: UL Class A Impact resistance: Class 3 Thermal and Solar Reflectivity: 0.25 SR, Thermal Emittance .92, 25 SRI Strip Size: Manufacturer’s standard.

Color and Blends: As selected by (CO) from manufacturer’s full range.

Hip and Ridge Shingles: Manufacturer's standard units to match asphalt shingles.

ORGANIC-FELT-REINFORCED ASPHALT SHINGLES

Multitab-Strip Asphalt Shingles: ASTM D 225, organic-felt reinforced, mineral-granule surfaced, and self-sealing; passing ASTM D 3161 for wind resistance.

Tab Arrangement: Three tab, regularly spaced. Snow Loads: 30 lb/SF.

Cutout Shape: Square.

Butt Edge: Stagger cut.

Fire resistance: UL Class A Impact resistance: Class 3 Thermal and Solar Reflectivity: 0.25 SR, Thermal Emittance .92, 25 SRI Strip Size: Manufacturer’s standard Color and Blends: As selected by (CO) from manufacturer’s full range.

Hip and Ridge Shingles: Manufacturer's standard units to match asphalt shingles.

RIDGE VENTS

Ridge cap vents must be compatible with specified roofing shingles.

General: Ventilating ridge cap with ventilating mesh providing a minimum net free area of 18 sq. in./ft. (380 sq. cm/m).

Plastic Ridge Cap: High-density polypropylene or other UV-stabilized plastic designed to be installed under shingles at ridge.

UNDERLAYMENT MATERIALS

Felts: ASTM D 226, Type II, asphalt-saturated organic felts, nonperforated.

Self-Adhering Sheet Underlayment, Polyethylene Faced: ICC ESR-5149, minimum of 25-mil- (0.64- mm-) thick, slip-resisting, tensile strength 250 psi, ~0.14 lb/sf, polyethylene-film-reinforced top surface laminated to SBS-modified asphalt adhesive, with release paper backing; cold applied.

ACCESSORIES

Asphalt Roofing Cement: ASTM D 4586, Type II, asbestos free.

Roofing Nails: ASTM F 1667; aluminum, stainless-steel, copper, or hot-dip galvanized steel wire shingle nails, minimum 0.120-inch- (3-mm-) diameter, smooth shank, sharp-pointed, with a minimum 3/8-inch- (9.5-mm-) diameter flat head and of sufficient length to penetrate 3/4 inch (19 mm) into solid wood decking or extend at least 1/8 inch (3 mm) through OSB or plywood sheathing.

Where nails are in contact with metal flashing, use nails made from same metal as flashing.

Felt Underlayment Nails: Aluminum, stainless-steel, or hot-dip galvanized steel wire with low profile capped heads or disc caps, 1-inch (25-mm) minimum diameter.

PART 3 - EXECUTION

EXAMINATION

Examine substrate, areas, and conditions, with Installer present, for compliance with requirements for installation tolerance and other conditions affecting performance of work.

Examine roof sheathing to verify that sheathing joints are supported by framing and blocking or metal clips and that installation is within flatness tolerances.

Verify that substrate is sound, dry, smooth clean, sloped for drainage, and completely anchored; and that provision has been made for flashing and penetrations through asphalt shingles.

Proceed with installation only after unsatisfactory conditions have been corrected.

UNDERLAYMENT INSTALLATION

Two-Layer Felt Underlayment: Install two layer of felt underlayment on roof deck perpendicular to roof slope in parallel courses. Lap sides a minimum of 2 inches (50

mm) over underlying course. Lap ends a minimum of 4 inches (100 mm). Stagger end laps between succeeding courses at least 72 inches (1830 mm). Fasten with felt underlayment nails.

Install felt underlayment on roof deck not covered by self-adhering sheet underlayment. Lap sides of felt over self-adhering sheet underlayment not less than 3 inches (75 mm) in direction to shed water. Lap ends of felt not less than 6 inches (150 mm) over self-adhering sheet underlayment.

Self-Adhering Sheet Underlayment: Install self-adhering sheet underlayment, wrinkle free, on roof deck. Comply with low-temperature installation restrictions of underlayment manufacturer if applicable. Install at locations indicated, lapped in direction to shed water. Lap sides not less than 3-1/2 inches (89 mm). Lap ends not less than 6 inches (150 mm) staggered 24 inches (600 mm) between courses. Roll laps with roller.

Cover underlayment within seven days.

Eaves: Extend form edges of eaves 36 inches (914 mm) beyond interior face of exterior wall.

Rakes: extend from edges of rake 36 inches (914 mm) beyond interior face of exterior wall.

Valleys: Extend from lowest to highest point on each side.

Hips: Extend 18 inches (450 mm).

Ridges: Extend 36 inches (914 mm) without obstructing continuous ridge vent slot.

Sidewalls: Extend beyond sidewall 18 inches (450 mm) vertically against sidewall not less than 8 inches.

Dormers, Chimneys, Skylights, and other Roof-Penetrating Elements: Extend beyond penetrating element 18 inches and return vertically against penetrating element not less than 4 inches (100 mm).

Roof slope Transitions: Extend 24 inches on each roof slope.

METAL FLASHING INSTALLATION

General: Install metal flashings and other sheet metal to comply with requirements in Division 7 Section "Sheet Metal Flashing and Trim."

1. Install metal flashings according to recommendations in ARMA's "Residential Asphalt Roofing Manual" and asphalt shingle recommendations in NRCA's "The NRCA Roofing and Waterproofing Manual."

2. Separation: Separate metal from incompatible metal or corrosive substrates, including wood, by coating concealed surfaces, at locations of contact, with bituminous coating or providing other permanent separation.

Apron Flashings: Extend lower flange over and beyond each side of downslope asphalt shingles and up the vertical surface.

Step Flashings: Install with a headlap of 2 inches (50 mm) and extend over the underlying asphalt shingle and up the vertical surface. Fasten to roof deck only.

Cricket Flashings: Install against the roof-penetrating element extending concealed flange beneath upslope asphalt shingles and beyond each side.

Open Valley Flashing: Install centrally in valleys, lapping ends at least 8 inches (200mm) in direction to shed water. Fasten upper end of each length to roof deck beneath overlap.

Secure hammed flange edges into metal cleats spaced 12 inches (300 mm) apart and fastened to roof deck.

Adhere [9 inch (225 mm) wide strip of self-adhering sheet to metal flanges and to self-adhering sheet underlayment.

Rake Drip Edges: Install rake drip edge flashings over underlayment and fasten to roof deck.

Eave Drip Edges: Install eave drip edge flashings below underlayment and fasten to roof sheathing.

Pipe Flashing: Form flashing around pipe penetrations and asphalt shingles. Fasten and seal to asphalt shingles as recommended by manufacturer.

ASPHALT SHINGLE INSTALLATION

Install asphalt shingles according to manufacturer's written instructions, recommendations in ARMA's "Residential Asphalt Roofing Manual," and asphalt shingle recommendations in NRCA's "The NRCA Roofing and Waterproofing Manual."

Install starter strip along lowest roof edge, consisting of an asphalt shingle strip with tabs removed with self-sealing strip face up at roof edge.

Extend asphalt shingles 1/2 inch (13 mm) over fascia at eaves and rakes.

Install starter strip along rake edge.

Install first and remaining courses of asphalt shingles stair stepping diagonally across roof deck with manufacturer's offset pattern at succeeding courses, maintaining uniform exposure.

Install first and remaining courses of asphalt shingles stair stepping diagonally across roof deck with manufacturer’s recommended offset pattern at succeeding courses, maintaining uniform exposure.

Fasten asphalt shingle strips with a minimum of six roofing nails located according to manufacturers written instructions.

Where roof slope exceeds 20:12, seal asphalt shingles with asphalt roofing cement spots after fastening with additional roofing nails.

Where roof slope is less than 4:12, seal asphalt shingles with asphalt roofing cement spots.

When ambient temperature during installation is below 50 deg F (10 deg C), seal asphalt shingles with asphalt roofing cement spots.

Ridge Cap Shingles: Maintain same exposure of cap shingles as roofing shingle exposure.

Lap cap shingles at ridges to shed water away from direction of prevailing winds.

Fasten with roofing nails of sufficient length to penetrate sheathing.

Fasten ridge cap asphalt shingles to cover ridge vent without obstructing airflow.

Flange Seals: Unless otherwise indicated, set flanges of accessory units in a thick bed of roofing cement to form seal.

Cap Flashing: Where required as component of accessory, install cap flashing to provide waterproof overlap with roofing or roof flashing (as counterflashing). Seal overlap with thick bead of mastic sealant.

Clean exposed surfaces according to manufacturer's written instructions. Touch up damaged metal coatings.

END OF SECTION 07311

SECTION 07720

ROOF ACCESSORIES

PART 1 - GENERAL

SUMMARY

This Section includes the following:

Roof curbs.

Equipment supports.

Relief vents.

Ridge vents.

Snow guards.

Drip Edge.

Flashing Roof vents

Maintenance & Repainting

SUBMITTALS

Product Data: For each product indicated.

Coordination Drawings: Roof plans are drawn approximately to scale and coordinating penetrations and roof-mounted items are indicated. Contractor shall field verify dimensions and Penetrations sizes and locations.

Samples and Colors: for each exposed finish

QUALITY ASSURANCE

Standards: Comply with the following:

SMACNA's "Architectural Sheet Metal Manual" details for fabrication of units, including flanges and cap flashing to coordinate with type of roofing indicated.

NRCA's "Roofing and Waterproofing Manual" details for installing units.

PART 2 - PRODUCTS

MATERIALS

Aluminum:

Sheet: ASTM B 209 (ASTM B 209M) for alclad alloy 3005H25 or alloy and temper required to suit forming operations, with mill finish, unless otherwise indicated.

Extrusions: ASTM B 221 (ASTM B 221M) alloy 6063-T52 or alloy and temper required to suit structural and finish requirements, with mill finish, unless otherwise indicated.

Galvanized Steel Sheet: ASTM A 653/A 653M with G90 (Z275); commercial steel, unless otherwise indicated.

Aluminum-Zinc Alloy-Coated Steel Sheet: ASTM A 792/A 792M with Class AZ-50 (AZ-

150) coating, structural quality, Grade 40 (Grade 275), or as required for strength.

Wood Nailers: Softwood lumber, pressure treated with waterborne preservatives for aboveground use, complying with AWPA C2; not less than 1-1/2 inches (38 mm) thick.

Fasteners: Same metal as metals being fastened, or nonmagnetic stainless steel or other noncorrosive metal as recommended by manufacturer. Match finish of exposed fasteners with finish of material being fastened.

Gaskets: Manufacturer's standard tubular or fingered design of neoprene, EPDM, or PVC;

or flat design of foam rubber, sponge neoprene, or cork.

Bituminous Coating: SSPC-Paint 12, solvent-type bituminous mastic, nominally free of sulfur and containing no asbestos fibers, compounded for 15-mil (0.4-mm) dry film thickness per coating.

Mastic Sealant: Polyisobutylene; nonhardening, nonskinning, nondrying, nonmigrating sealant.

Elastomeric Sealant: Recommended by unit manufacturer that is compatible with joint surfaces; ASTM C 920, Type S, Grade NS, Class 25.

Roofing Cement: ASTM D 4586, nonasbestos, fibrated asphalt cement designed for trowel application or other adhesive compatible with roofing system.

Aluminum Ridge Caps: Fabricate with baffles to prevent snow and rain entering and with weep holes to allow water to drain to roof. Provide required splice plates and end caps.

Clear Anodic Finish: Class I coating complying with AAMA 607.1.

Color Anodic Finish: Class I coating complying with AAMA 606.1 or AAMA 608.1.

Color: As selected by CO from full range of industry colors and densities.

Baked-Enamel Finish: Manufacturer's standard two-coat thermocured system.

Color and Gloss: As selected by CO from manufacturer's full range.

High-Performance Organic Coating Finish: Fluoropolymer three-coat system with topcoats containing not less than 70 percent polyvinylidene fluoride resin by weight; complying with ASCA 96 or AAMA 620.

Color and Gloss: As selected by CO from manufacturer's full range.

Zinc Roof Strip: minimum 2.5 inch wide roof strips to prevent moss and mildew growth.

Attach with rubber gasket roofing nails.

METAL FLASHING AND TRIM

Fabricate sheet metal flashing and trim to comply with recommendations in SMACNA's "Architectural Sheet Metal Manual" that apply to design, dimensions, metal, and other characteristics of item.

Apron Flashings: Fabricate with lower flange a minimum of 5 inches (125 mm) over and 4 inches (100 mm) beyond each side of downslope asphalt shingles and 6 inches (150 mm) up the vertical surface.

Step Flashings: Fabricate with a headlap of 2 inches (50 mm) and a minimum extension of 5 inches (125 mm) over the underlying asphalt shingle and up the vertical surface. Or as recommended by roofing manufacturer instructions.

Drip Edges: Fabricate in lengths not exceeding 10 feet (3m) with 2-inch (50 mm) roof deck flange and 1-1/2 inch (38 mm) fascia flange with 1/2 inch (9.6 mm) drip at lower edge.

Vent Pipe Flashing: ASTM B 749, Type L51121, at least 1/16 inch (1.6 mm) thick.

Provide lead sleeve size to slip over and turn down into pipe, soldered to skirt at slope of roof and extending at least 4 inches (100 m) from pipe onto roof.

Available Manufacturing Requirements: American made product. Subject to compliance with roofing manufacturing requirements.

B. General: Corrosion-resistant flashing must be used to help prevent leaks where a roof meets a wall, another roof, a chimney or other objects that penetrate a roof.

1. Metal Flashing: minimum dimensions need to be 4”(102mm) by 4”(102mm) by 7 5/8’(193mm).

ROOF CURBS AND EQUIPMENT SUPPORTS

General: Units capable of supporting superimposed live and dead loads, including equipment loads and other construction to be supported. Coordinate dimensions with equipment to be supported.

Provide preservative-treated wood nailers at tops of units and formed flange at perimeter bottom for mounting to roof.

On ribbed or fluted metal roofs, form flange at perimeter bottom to conform to roof profile.

Fabricate units to minimum height of 8 inches (200 mm), unless otherwise indicated.

Where slope of roof deck exceeds 1/4 inch per foot (1:48), fabricate support units with height tapered to match slope to level tops of units.

Roof Curbs:

Fabrication: Unless otherwise indicated or required for strength, fabricate units from minimum 0.0747-inch- (1.9-mm-) thick, structural-quality, hot-dip galvanized or aluminum-zinc alloy-coated steel sheet; factory primed and prepared for painting with welded or sealed mechanical corner joints.

Fabrication: Unless otherwise indicated or required for strength, fabricate units from minimum 0.063-inch- (1.6-mm-) thick, sheet aluminum with welded corner joints.

Insulation: Manufacturer's standard rigid or semirigid insulation where indicated.

Cants: Formed cants and base profile coordinated with roof insulation thickness.

Equipment Supports: Capable of supporting superimposed live and dead loads, including equipment loads and other construction to be supported. Coordinate dimensions with equipment to be supported.

Fabrication: Unless otherwise indicated or required for strength, fabricate units from minimum 0.0747-inch- (1.9-mm-) thick, structural-quality, hot-dip galvanized or aluminum-zinc alloy-coated steel sheet; factory primed and prepared for painting with welded or sealed mechanical corner joints.

Fabrication: Unless otherwise indicated or required for strength, fabricate units from minimum 0.063-inch- (1.6-mm-) thick, sheet aluminum with welded corner joints.

RELIEF VENTS

Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

Aura Ventilation, Inc.

Bristolite Skylights.

Commodity Products Company, Inc.

Dowco Products Group.

Dur-Red Products, Inc.

Goeller Enterprises.

Metallic Products Corporation.

Solar Group (The).

ThyCurb, Inc.

Trimco, Inc.

Vent Products Co., Inc.

Western Canwell.

Low-Profile Gravity Ventilators: Of sizes, style, and profile indicated.

Material: [Galvanized steel] [Aluminum] sheet.

Prime-Painted Finish: Manufacturer's standard exterior galvanized steel primer specified in Division 9 Section "Painting."

Color and Gloss: As selected by Contracting Officer (CO) from manufacturer's full range.

High-Performance Organic Coating Finish: Fluoropolymer three-coat system with topcoats containing not less than 70 percent polyvinylidene fluoride resin by weight; complying with AAMA 621 for galvanized steel or ASCA 96 or AAMA 620 for aluminum.

Color and Gloss: As selected by CO from manufacturer's full range.

Color Anodic Finish: Class I coating complying with AAMA 606.1 or

AAMA 608.1.

Color: As selected by CO from full range of industry colors and densities.

Bird Screens: 1/2-inch- (13-mm-) square mesh with 0.062-inch- (1.6-mm-) diameter, stainless-steel wire.

Insect Screens: 14-by-18 (1.5-by-1.1-mm) mesh with 0.0123-inch- (0.3-mm-) diameter, anodized aluminum wire in removable, rewirable frames.

Manual Dampers: Designed for operation from floor directly below ventilator unit.

Roof Curb Construction: Curb-mount units designed for installing 1-1/2-inch- (38-mm-) thick wood curbs.

Roof Curb Construction: Self-flashing units with integral self-supporting double-wall aluminum curb, enclosing minimum 1-inch- (25-mm-) thick, glass-fiber board insulation (or equivalent), and with minimum 3-inch (75-mm) roof flanges.

RIDGE VENTS

Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

Air Vent, Inc.

Alcoa Building Products.

Commodity Products Company, Inc.

Cor-A-Vent, Inc.

GAF Materials Corporation.

Klauer Manufacturing Co.

Metallic Products Corporation.

Mid-America Building Products Corporation.

Niff-Corr, Inc.

Obdyke, Benjamin, Inc.

Petersen Aluminum Corp.

Plyco Corporation.

Solar Group (The).

ThyCurb, Inc.

Trimco, Inc.

Trimline Roof Ventilation Systems.

Western Canwell.

General: Ventilating ridge cap with ventilating mesh providing a minimum net free area of 18 sq. in./ft. (380 sq. cm/m).

Aluminum Ridge Cap: Fabricate from sheet aluminum with baffles to prevent snow and rain entering and with weep holes to allow water to drain to roof. Provide required splice plates and end caps.

Color Anodic Finish: Class I coating complying with AAMA 606.1 or AAMA 608.1.

Color: As selected by CO from full range of industry colors and densities.

Color and Gloss: As selected by CO from manufacturer's full range.

High-Performance Organic Coating Finish: Fluoropolymer three-coat system with topcoats containing not less than 70 percent polyvinylidene fluoride resin by weight; complying with ASCA 96 or AAMA 620.

Color and Gloss: As selected by CO from manufacturer's full range.

Plastic Ridge Cap: High-density polypropylene or other UV-stabilized plastic designed to be installed under shingles at ridge.

ROOF HATCHES

Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

Babcock-Davis Hatchways, Inc.

Bilco Company.

Bristolite Skylights.

Custom Curb, Inc.

Dur-Red Products, Inc.

Goeller Enterprises.

Hi Pro International, Inc.

J. L. Industries, Inc.

Metallic Products Corporation.

Milcor, Inc.

Nystrom Products Co.

O'Keeffe's Inc.

Precision Stair Corporation.

Roof Products & Systems Corp.

ThyCurb, Inc.

Trimco, Inc.

Wasco Products, Inc.

General: Frame with minimum 9-inch- (225-mm-) high, integral-curb, double-wall construction with 1-1/2-inch (38- mm) insulation, formed cants and cap flashing (roofing counterflashing), with welded or sealed mechanical corner joints. Provide double-wall cover (lid) construction with 1- inch- (25-mm-) thick insulation core.

Provide gasketing and equip with corrosion-resistant or hot-dip galvanized hardware including pintle hinges, hold-open devices, interior padlock hasps, and both interior and exterior latch handles.

Fabricate units to withstand 40-lbf/sq. ft. (1.9-kPa) external and 20-lbf/sq. ft. (0.95-kPa) internal loading pressure.

Sloping Roofs: Where slope or roof deck exceeds 1/4 inch per foot (1:48), fabricate hatch curbs with height tapered to match slope to level tops of units.

ROOF WALKWAYS

Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

GS Metals Corp.

Unistrut Corporation.

Metal-Grating Type: Formed-metal plank gratings of C-shaped channels rolled from heavy sheet metal and punched in serrated diamond shape to produce raised slip-resistant surface and drainage holes. Provide support framing, brackets, connectors, nosings, and other accessories and components needed for complete installation. Include step units for changes in elevation.

Material: 0.07-inch (1.8-mm), structural-quality, galvanized steel sheet.

For Flat Roofs: Provide resilient, hard rubber pads under each support unit to isolate supports from and protect roof membrane.

For Sloped Roofs: Provide support stands designed for type of roof installed.

SNOW GUARDS

Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

Berger Building Products Corp.

LMCurbs.

M. J. Mullane Company.

Polar Blox, Inc.

Riddell & Company, Inc.

Sieger Snow Guards, Inc.

Sno-Gem, Inc.

Snojax, Inc.

Snow Management Systems.

Steel Tile Company.

ThyCurb, Inc.

Vermont Slate and Copper Services, Inc.

Zaleski Snow-Guard and Roofing Specialties Inc.

General: Prefabricated, noncorrosive units designed to be installed without penetrating roof and complete with predrilled holes, clamps, or hooks for anchoring.

Plastic Type: Polycarbonate, designed for attachment to roof surface using silicone or polyurethane elastomeric sealant or adhesive tape, as recommended by manufacturer.

Metal Type: Prefabricated, copper or bronze and copper units, designed for use with type of roof specified.

Metal Bar Type: Consisting of aluminum or stainless-steel rods or bars held in place by supports clamped to vertical ribs of standing-seam roof.

DRIP EDGE

Available Manufacturing Requirements: American made product. Subject to compliance with roofing manufacturing requirements.

General: Metal Drip Edge needs 1⁄2" overhanging the rakes and eaves.

MAINTENANCE REPAINTING

GENERAL REQUIRMENTS

Available Manufacturing Requirements: American made product. The fascia boards are to be painted before installing the drip edge. Paint should match existing fascia boards.

PREPARATORY CLEANING, PAINT REMOVAL, PATCHING, AND REPAIRING

Fascia board needs to be preparatorily cleaned with chemical cleaning or pressure washer. Then loose, hanging, compromised paint needs to be removed with hand tools such as a wire brush. Then begin the patching and repairing to the drip edges exposed sides with substrates with dents and gouges larger than 1/4 inch.

QUALITY ASSURNACE

Color Matching: Computer matched.

A Material Safety Data Sheet (MSDS) needs to be provided by the paints manufacturer for each color scheme used.

2.9 FLASHING

with roofing manufacturing requirements.

B. General: Corrosion-resistant flashing must be used to help prevent leaks where a roof meets a wall, another roof, a chimney or other objects that penetrate a roof.

1. Metal Flashing: minimum dimensions need to be 4”(102mm) by 4”(102mm) by 7 5/8’(193mm).

ROOF (RIDGE) VENTS

with roofing manufacturing requirements.

PART 3 - EXECUTION

INSTALLATION

General: Coordinate installation of roof accessories with installation of roof deck, roof insulation, flashing, roofing membranes, penetrations, equipment, and other construction to ensure that combined elements are waterproof and weathertight.

Anchor roof accessories securely to supporting structural substrates so they are capable of withstanding lateral and thermal stresses, and inward and outward loading pressures.

Install roof accessory items according to construction details in NRCA's "Roofing and Waterproofing Manual," unless otherwise indicated, Separation: Separate metal from incompatible metal or corrosive substrates, including wood, by coating concealed surfaces, at locations of contact, with bituminous coating or providing other permanent separation.

Flange Seals: Unless otherwise indicated, set flanges of accessory units in a thick bed of roofing cement to form seal.

Cap Flashing: Where required as component of accessory, install cap flashing to provide waterproof overlap with roofing or roof flashing (as counterflashing). Seal overlap with thick bead of mastic sealant.

Zinc Strips: Install Zinc strips per manufactures recommendation 3 inches below ridge caps.

Operational Units: Test-operate units with operable components. Clean and lubricate joints and hardware. Adjust for proper operation.

Heat-and-Smoke Vents: Locate, install, and test according to NFPA 204M.

Snow Guards: Install according to manufacturer's written recommendations and NRCA's "Steep Roofing Manual." Unless otherwise indicated, locate snow guards at 18 inches (450 mm) o.c. horizontally, and at every other course vertically, beginning 24 inches (600 mm) up from gutter. Stagger snow guard location by 9 inches (225 mm) between courses.

Clean exposed surfaces according to manufacturer's written instructions. Touch up damaged metal coatings.

END OF SECTION 0772

SECTION 024119 - SELECTIVE DEMOLITION

PART 1 - GENERAL

1.1 Items indicated to be removed become Contractor's property. Detach materials designated for removal from existing construction, and dispose of the existing roofing materials and items of off National Forest in accordance with all state and federal laws. The Contractor shall be responsible for all costs, royalties, arrangements, procurement, cleanup, and work associated with a waste disposal area.

1.2 Government will occupy portions of building immediately adjacent to selective demolition area. Conduct selective demolition so Owner's operations will not be disrupted. It is not expected that hazardous materials will be encountered in the work. If hazardous materials are encountered, do not disturb; immediately notify CO in writing. Hazardous materials will be removed by Government under a separate contract action.

1.2 Measurement of Payment - SELECTIVE DEMOLITION, will be paid in lump sum quantity and will include all costs of demolition, collection haul, fees, and waste disposal.

PART 2 PRODUCTS (NOT USED)

PART 3 - PEFORMANCE REQUIREMENTS

A. Regulatory Requirements: Comply with EPA regulations and with hauling and disposal regulations of authorities having jurisdiction.

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

PART 4 - EXECUTION

A. DEMOLITION

Maintain services/systems indicated to remain and protect them against damage during selective demolition operations. Before proceeding with demolition, provide temporary services/systems that bypass area of selective demolition and that maintain continuity of services/systems to other parts of the building.

Provide temporary barricades and other protection required to prevent injury to people and damage to adjacent buildings and facilities to remain.

Provide temporary weather protection to prevent water leakage and damage to structure and interior areas.

Neatly cut openings and holes, keeping work square, plumb and true to dimensions required. Use cutting methods least likely to damage existing construction or adjoining construction.

Clean adjacent structures, driveways, walkways, lawns, and improvements of dust, dirt, nails, and debris caused by selective demolition operations. Return adjacent areas to condition existing before selective demolition operations began at the end of each night.

All trash and construction debris resulting from installation, demolition, and construction are the responsibility of the Contractor and shall be removed and disposed of legally. It is the Contractor’s responsibility to locate an acceptable disposal area, and to pay all costs involved in the disposal of materials.

February 2025

SECTION 06100

ROUGH CARPENTRY

PART 1 - GENERAL

SUMMARY

This Section includes the following:

Wood framing.

Wood supports.

Wood blocking.

Wood cants.

Wood nailers.

Wood furring.

Wood grounds.

Wood sheathing.

Wood subflooring.

Wood underlayment.

Plywood backing panels.

Building wrap.

SUBMITTALS

Product Data: For each type of process and factory-fabricated product indicated.

Include data for wood-preservative and fire-retardant treatment from chemical treatment manufacturer and certification by treating plant that materials comply with requirements.

Research/Evaluation Reports: For the following:

Treated wood.

Engineered wood products.

Foam-plastic sheathing.

Power-driven fasteners.

Powder-actuated fasteners.

Expansion anchors.

Metal framing anchors.

Building wrap.

PART 2 - PRODUCTS

MANUFACTURERS

In other Part 2 articles where subparagraph titles below introduce lists, the following requirements apply for product selection:

Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the work include, but are not limited to, the manufacturers specified.

WOOD PRODUCTS, GENERAL

Lumber: DOC PS 20 and applicable rules of lumber grading agencies certified by the American Lumber Standards Committee Board of Review.

Factory mark each piece of lumber with grade stamp of grading agency.

For exposed lumber indicated to receive stained or natural finish, mark grade stamp on end or back of each piece or omit grade stamp and provide certificates of grade compliance issued by grading agency.

Provide dressed lumber, S4S, unless otherwise indicated.

Provide dry lumber with 15 percent maximum moisture content at time of dressing for 2-inch nominal (38-mm actual) thickness or less, unless otherwise indicated.

Engineered Wood Products: Acceptable to authorities having jurisdiction and for which current model code research or evaluation reports exist that show compliance with building code in effect for Project.

Allowable Design Stresses: Meet or exceed those indicated per manufacturer's published values determined from empirical data or by rational engineering analysis and demonstrated by comprehensive testing performed by a qualified independent testing agency.

Wood Structural Panels:

Plywood: Either DOC PS 1 or DOC PS 2, unless otherwise indicated.

Oriented Strand Board: DOC PS 2.

Comply with "Code Plus" provisions in APA Form No. E30K, "APA

Design/Construction Guide: Residential & Commercial."

WOOD-PRESERVATIVE-TREATED MATERIALS

Preservative Treatment by Pressure Process: AWPA C2 (lumber) and AWPA C9 (plywood), except that lumber that is not in contact with the ground and is continuously protected from liquid water may be treated according to AWPA C31 with inorganic boron (SBX).

Wood for Wood Foundation Systems: WPB FDN.

Wood for Ground Contact Use: AWPB LP-22.

Wood for Aboveground Use: AWPB LP-2.

Kiln-dry material after treatment to maximum moisture content of 15 percent for plywood.

Mark each treated item with treatment quality mark of an inspection agency approved by the American Lumber Standards Committee Board of Review.

Application: Treat items indicated on Drawings, and the following:

Wood cants, nailers, curbs, equipment support bases, blocking, stripping, and similar members in connection with roofing, flashing, vapor barriers, and waterproofing.

Wood sills, sleepers, blocking, furring, stripping, and similar concealed members in contact with masonry or concrete.

Wood framing members less than 18 inches (460 mm) above grade.

Wood floor plates that are installed over concrete slabs directly in contact with earth.

FIRE-RETARDANT-TREATED MATERIALS

General: Where fire-retardant-treated materials are indicated, provide materials that comply with performance requirements in AWPA C20 (lumber) and WPA C27 (plywood).

Identify fire-retardant-treated wood with appropriate classification marking of UL, U.S. Testing, Timber Products Inspection, or another testing and inspecting agency acceptable to authorities having jurisdiction.

Use treatment for which chemical manufacturer publishes physical properties of treated wood after exposure to elevated temperatures, when tested by a qualified independent testing agency according to ASTM D 5664, for lumber and ASTM D 5516, for plywood.

Use treatment that does not promote corrosion of metal fasteners.

Use Exterior type for exterior locations and where indicated.

Use Interior Type A High Temperature (HT), unless otherwise indicated.

DIMENSION LUMBER

General: Of grades indicated according to the American Lumber Standards Committee National Grading Rule provisions of the grading agency indicated.

Non-Load-Bearing Interior Partitions: Construction, Stud, or No. 2 Standard, Stud, or No. 3 grade and any of the following species:

Northern species; NLGA.

Western woods; WCLIB or WWPA.

Framing Other Than Non-Load-Bearing Partitions: Construction, Stud, or No. 3 grade and any of the following species:

Douglas fir-larch, Douglas fir-larch (north), or Douglas fir-south; NLGA, WCLIB, or

WWPA.

Hem-fir or Hem-fir (north); NLGA, WCLIB, or WWPA.

Spruce-pine-fir (south) or Spruce-pine-fir; NELMA, NLGA, WCLIB, or WWPA.

Framing Other Than Non-Load-Bearing Partitions: Any species of machine stress-rated dimension lumber with a grade of not less than 2400f-2.0E.

Exposed Framing: Hand select material for uniformity of appearance and freedom from characteristics that would impair finish appearance.

Species and Grade: Hem-fir or Hem-fir (north), Select Structural grade; NLGA, WCLIB, or WWPA – saw texture.

Species and Grade: Spruce-pine-fir or Spruce-pine-fir (south), No. 1 grade; NELMA, NLGA, WCLIB, or WWPA – saw texture.

Redwood, clear all heart grade per RIS rules.

Cedar, “A” grade, saw texture, per western red cedar rules.

TIMBER AND MISCELLANEOUS LUMBER

For timbers of 5-inch nominal (117-mm actual) size and thicker, provide material complying with the following requirements:

Species and Grade: Douglas fir-larch, Douglas fir-larch (north), or Douglas fir-south;

Select Structural No. 1 grade; NLGA< WCLIB< or WWPA.

Provide miscellaneous lumber for support or attachment of other construction, including the following:

Rooftop equipment bases and support curbs.

Blocking.

Cants.

Nailers.

Furring.

Grounds.

For items of dimension lumber size, provide Construction, Stud, or No. 2-grade lumber with 19 percent maximum moisture content of any species.

For concealed boards, provide lumber with 19 percent maximum moisture content and any of the following species and grades:

Northern species, No. 3 Common grade; NLGA.

Western woods, Standard or No. 3 Common grade; WCLIB or WWPA.

ENGINEERED WOOD PRODUCTS

Laminated-Veneer Lumber (LVL): Prefabricated wood beams and headers composite of wood veneers with grain primarily parallel to member lengths, manufactured with exterior-type adhesive complying with ASTM D 2559. Allowable design values determined according to ASTM D 5456.

Extreme Fiber Stress in Bending, Edgewise: 2500 psi (17.2 MPa) for 12-inch nominal- (286-mm actual-) depth members.

Modulus of Elasticity, Edgewise: 2,000,000 psi (13 800 MPa).

Wood I-Joists: Prefabricated units complying with APA PRI-400; depths and performance ratings not less than those…