Attach_4_Canyon_Creek_Specifications_FINAL.docx

Bureau of Land Management Project Specifications

SECTION 01 35 91 — HISTORIC TREATMENT PROCEDURES

PART 1 — GENERAL

1.1 SUMMARY

A. This section establishes procedures for work on the Canyon Creek Stage Station, a historic structure, to ensure compliance with the Secretary of the Interior's Standards for the Treatment of Historic Properties.

1.2 REFERENCES

A. Secretary of the Interior's Standards for the Treatment of Historic Properties (Attachment 1).

1.3 SUBMITTALS

A. Acknowledgment of "Secretary of the Interior's Standards for the Treatment of Historic Properties" Checklist (Attachment 1).

B. Cut sheets and product data for all materials, governing contract clause and Statement of Work.

C. Photographic documentation of existing conditions prior to start of work, at each of the four door openings and five window openings.

1.4 QUALITY ASSURANCE

A. As specified in the Statement of Work.

PART 2 — PRODUCTS Not used

PART 3 — EXECUTION

3.1 GENERAL REQUIREMENTS

A. Field verify all door and window openings prior to fabrication; openings are not guaranteed plumb or square due to age and settlement of the structure.

B. Do not remove or alter historic components (rock walls, existing plaster lines, existing framing) beyond what is required to install new doors, windows, and associated trim.

C. Deteriorated historic material shall be repaired rather than replaced wherever feasible, consistent with Attachment 1.

3.2 DOCUMENTATION OF NEW WORK

A. Any new work should be noted on the as-builts with the date of installation and installer identity for any future renovation work.

B. Submit final documentation package (scaled shop drawings, photographs, plan/elevation drawings created during the work) to the COR upon completion.

3.3 INSPECTION

A. BLM COR shall inspect work for Standards compliance at progress milestones and prior to final acceptance. Work found to deviate from the Standards shall not be paid until corrected.

SECTION 04 01 40 — MAINTENANCE OF MASONRY

PART 1 — GENERAL

1.1 SUMMARY A. This section covers repair of existing masonry thresholds at the four door openings, and any incidental masonry repair required for door/window installation.

1.2 SUBMITTALS

A. Mortar mix design for review and approval prior to any masonry repair work.

B. Concrete mix design for review and approval prior to concrete sill placement.

PART 2 — PRODUCTS

2.1 MORTAR

A. Mortar shall be compatible in composition, strength, and appearance with existing historic mortar (mud mortar reinforced with horsehair) per Attachment 1's material-compatibility requirement.

B. Rebuilding (Setting) Mortar Standard: ASTM C270, Type N or Type O (softer, more permeable types appropriate for use near soft historic lava rock and mud mortar — do NOT use a hard portland-cement-heavy mix).

C. Match color, texture, and softness of existing mud mortar as closely as practical within the constraints of the ASTM C270 type selected. Submit mortar sample for BLM COR and Archeologist (SME) approval prior to full-scale repair.

2.2 CONCRETE

A. Mix Design (Concrete Sill @ Door):

· 28‑day compressive strength: 4000 psi

· Slump: 4–5 inches

· Air content: 4–6%

· Aggregate size: ⅜" pea gravel

· Fibers: Micro‑synthetic fiber reinforcement, 1.5 lb per cubic yard

PART 3 — EXECUTION

3.1 PREPARATION

A. Field verify condition and extent of deteriorated masonry at each of the four door thresholds prior to repair.

B. Contractor to supply all water per SOW (no water available on site).

C. Perform masonry repair only when air temperature is between 40°F and 90°F and is predicted to remain so for at least 3 days following completion of the work, unless otherwise approved by the COR.

3.2 REPAIR

A. Remove only deteriorated masonry necessary to receive new door hardware and framing.

B. Repair masonry to match existing thickness, texture, and coursing.

C. Protect adjacent existing rock wall surfaces during repair work.

D. Curing: Cure mortar by maintaining in a thoroughly damp condition for at least 72 consecutive hours after placement, including weekends and holidays.

E. Hairline cracking within the mortar or mortar separation at the edge of a joint is unacceptable; completely remove and repoint any such areas.

SECTION 06 22 00 — MILLWORK

1.1 SUMMARY

A. This section covers fabrication of doors, windows, trim, and interior wood paneling.

1.2 SUBMITTALS

A. Scaled shop drawings for all doors, windows, and trim, dimensioned per field verification.

B. Species/grade samples for approval.

1.3 QUALITY ASSURANCE

A. Species/grade to be reviewed and approved by BLM B. Furnish hardwood lumber graded in accordance with the latest edition of Hardwood Manufacturers Association (or NHLA) standards, or equal grading authority.

1.4 DELIVERY, STORAGE, AND HANDLING

A. Protect finish material from the weather during transit and storage. Contractor shall provide adequate weather protection for fabricated millwork prior to installation.

PART 2 — PRODUCTS

2.1 EXTERIOR MATERIAL

A. Sapele Mahogany, clear premium grade, or equal species approved by BLM, for all exterior trim, sash, jambs, door stiles and rails. Vertical grain for rails and stiles.

2.2 INTERIOR MATERIAL

A. When noted on drawings, interior raised paneling shall be Pine - C & Better Select.

2.3 DIMENSIONAL TOLERANCES

A. Doors: nominal 1-5/8" thickness.

B. Windows: 1-3/8" per plans, all Main Floor and Dormer windows.

2.4 GENERAL NOTES

A. Protect finish material from the weather during transit and storage.

PART 3 — EXECUTION

3.1 FABRICATION

A. Fabricate to field-verified dimensions, not solely to plan dimensions, due to documented lack of plumb/square in existing openings.

B. Provide supplemental support structure at each opening as required for installation; conceal upon completion of paneling.

3.2 INSTALLATION

A. Set trim, casing, and other exposed woodwork in sizes and quantity shown on drawings, using good practice and appropriate fasteners given exposure conditions and in keeping with architectural requirements described in the SOW, Attachment 2, and Attachment 3.

B. Use hot-dip galvanized (or equivalent corrosion-resistant) fasteners for all exposed exterior millwork.

C. Fill nail/fastener holes in surfaced material and sand smooth before painting.

D. Glue built-up millwork components with waterproof glue.

SECTION 07 60 00 — FLASHING AND SHEET METAL

1.1 SUMMARY

A. This section covers galvanized flashing at door heads, window heads and sills, and the dormer gable face.

PART 2 — PRODUCTS

2.1 GALVANIZED FLASHING

A. Galvanized Steel Sheet: ASTM A653/A924, G90 zinc coating, unless otherwise indicated

1. 28 GA galvanized steel, mastic-applied, at: door heads; window heads; dormer gable Z-metal between crown molding and shingles.

2. 24 GA at window sills per Attachment 3 sheet D.6. See Section 08 52 00, 2.4.B.

B. Fasteners: same metal as sheet metal flashing, or other noncorrosive metal as recommended by sheet metal manufacturer. Conceal fasteners where possible

PART 3 — EXECUTION

3.1 INSTALLATION

A. Turn edge 1/4" down vertically on all three sides at door/window head flashing, per Attachment 3 sheet D.4.

B. Seal with mastic per manufacturer's recommendations.

C. Leave designated weep/drainage joints unsealed as directed in Plans.

3.2 WARRANTY

A. Repair leaks that occur during the warranty period in the flashing/trim systems

SECTION 08 14 00 — WOOD DOORS

1.1 SUMMARY

A. Fabrication and installation of four (4) exterior entry doors.

1.2 SUBMITTALS

A. Scaled shop drawings showing field-verified dimensions, panel configuration, and hardware locations for each of the four doors.

B. Product cut sheet for polyurethane caulking.

PART 2 — PRODUCTS

2.1 DOOR CONSTRUCTION

A. Species: Sapele Mahogany or equal species.

B. Thickness: 1-3/8" per plan, 1-5/8" permitted.

C. Nominal size: 36" x 80" (rough opening), field verify actual dimension.

D. Raised panel configuration per Attachment 2, sheet A.14, and Attachment 3, sheet D.4.

2.2 FLASHING

A. 28 GA galvanized steel above door head trim, mastic-applied, per Attachment 3 sheet D.4.

2.3 SEALANT

A. Polyurethane caulking at door perimeter.

PART 3 — EXECUTION

3.1 INSTALLATION

A. Install supplemental support structure as required; conceal with paneling.

B. Coordinate installation with masonry threshold repair. Thresholds shall be repaired prior to door installation.

C. Coordinate hardware installation per Section 08 71 00.

3.2 EXAMINATION AND REJECTION CRITERIA

A. Examine each door prior to installation. Reject doors with any of the following defects:

1. Stains or other surface marks.

2. Chips, checks, blisters, scratches, or other damage to any exposed wood surface.

3. Warping (bow, cup, or twist) exceeding 1/4 inch measured over the door's height and width.

3.3 INSTALLATION CLEARANCES

A. Provide approximately 1/8 inch clearance at door heads and jambs, unless field conditions (per historic opening irregularity) require adjustment approved by the COR.

B. Provide clearance from bottom of door to threshold consistent with weather-sealing requirements.

SECTION 08 52 00 — WOOD WINDOWS

1.1 SUMMARY

A. Fabrication and installation of five (5) single-hung wood windows: three (3) Main Floor windows, two (2) Dormer windows.

1.2 SUBMITTALS

A. Scaled shop drawings showing field-verified dimensions for each window location.

PART 2 — PRODUCTS

2.1 WINDOW CONSTRUCTION

A. Species: Sapele Mahogany or equal species.

B. Thickness: 1-3/8".

C. Nominal size: 38" x 62" (rough opening), field verify. Dormer windows same design as Main Floor windows per Attachment 2, sheet A.13.

D. Configuration: top sash fixed, bottom sash operable, per Attachment 2 sheet A.13.

2.2 GLAZING

A. Tempered glass, all lites, for security and damage resistance.

2.3 HARDWARE

A. Locking stops: Brass sash bolts with Spring pins. Window Sash Spring bolts shall be antique brass with a ball end, sized to fit the fabrication limits of the window.

2.4 FLASHING

A. 28 GA galvanized steel above window head trim, mastic-applied.

B. 24 GA galvanized sill pan flashing at windows sill per Attachment 3, sheet D.6

2.5 SEALANT

A. Polyurethane caulking at window perimeter, except at designated weep/drainage joints.

PART 3 — EXECUTION

3.1 INSTALLATION

A. Install supplemental support structure as required; conceal with paneling.

B. Coordinate dormer gable face work (crown molding, shingles) per drawings. See SOW, and Attachment 2 sheets A.17–A.21.

SECTION 08 71 00 — DOOR HARDWARE

1.1 SUMMARY

A. This section schedules all door hardware for the four (4) entry doors.

1.2 SUBMITTALS

A. Hardware schedule for COR approval.

PART 2 — PRODUCTS (BLM-SUPPLIED, PER SOW TABLE 1)

2.1 LOCKSETS

A. Vertical rim style lockset, surface-applied to door and jamb, no morticing. Antique brass finish with white porcelain knobs (Figure 6, SOW). Remove privacy lever if present; doors shall lock only by key. Two (2) keys per lockset, per Attachment 2 sheet A.14.

2.2 HINGES

A. Decorative hinges: 3-1/2" antique brass, ball finials, (2) loose butt, (3) knuckle, (3) flat head screws. Three (3) per door = four (12) total. C. Surface mount on interior of doors.

2.3 DOOR CLOSERS

A. 1460 Series, surface mounted. One (1) per door.

PART 3 — EXECUTION

3.1 INSTALLATION

A. Install per approved hardware schedule and manufacturer's instructions.

B. Verify hardware function (locking, closing) at each door prior to final acceptance.

SECTION 09 90 00 — PAINTING AND COATING

1.1 SUMMARY A. This section covers finish for all new doors, windows, trim, and interior paneling.

1.2 SUBMITTALS

A. Color sample for BLM approval prior to application. Color shall be white; final approval by BLM.

PART 2 — PRODUCTS

2.1 PRIMER

A. Alkyd, oil-based.

2.2 TOPCOAT

A. Exterior high-performance 100% acrylic latex, two (2) coats.

2.3 SHINGLE FINISH

A. Treated, as provided

PART 3 — EXECUTION

3.1 APPLICATION

A. Prepare surfaces as directed by paint manufacturer.

B. Apply primer prior to installation and ensure full coverage of concealed surfaces.

C. Apply topcoat (2 coats) after installation and hardware fitting.

D. Match finish across all doors, windows, trim, and paneling for uniform appearance.

E. Do not apply finish when temperature or humidity are outside of manufacturer guidelines.

F. Follow drying times between coats as directed by paint manufacturer.

Canyon Creek Stage Station Repairs