SOW_Boise_District_Equipment_Shed_Roof_Replacement_FINAL.pdf

Statement of Work

Boise District Equipment Shed Roof Repair

Boise District BLM, Boise Idaho

Request to replace damaged roof trusses and metal roofing on existing pole barn at the Bureau of Land Management

(BLM) Boise District Wareyard.

Background: BLM Boise District has an existing 2,700 square feet wood construction pole barn with dimensions 27 feet x 100 feet and an overall height of 17 feet. The pole barn is sheeted on three sides with an open front. The roof is constructed of wood trusses and ribbed metal roof material. No construction drawings or as-builts are available for the existing structure. Contractor shall conduct thorough site visit and be familiar with all conditions affecting the work prior to bidding.

Building Information:

Eave Height: 12 feet, 6 inches

Roof Peak Height: 17 feet

Truss Overall Length: 29 feet

Truss is 2x6 and 2x4 material

Shed Depth: 27 feet

Width of Bays: 20 feet

Number of Bays: 5

During a recent wind event, a portion of the roof structure was removed from the building. The trusses and roof material were damaged during the event. The other part of the roof system stayed in place and had no apparent structural damage. Due to this storm damage, the pole barn needs new shop-built trusses to match the existing truss profile, geometry, and bay configuration. Truss member sizing, connections, hurricane tie hardware, and bracing shall be designed per Specification 061753 Shop Fabricated Wood Trusses. Work also includes the removal of existing metal roof material, securement of existing end wall siding, and new roof material installed for the entire structure, including over areas where existing trusses remain in place. Undamaged existing structure is not required to be altered beyond what is specified herein or as required to properly repair the building.

Applicable Codes and Authority Having Jurisdiction: This project is located on federal property; BLM is the

Authority Having Jurisdiction (AHJ). Local building permits will not be required. This project is classified as a

Repair under 2024 IEBC Chapter 4. Portions of the design considering wind uplift shall follow the 2024 IEBC

Appendix C: Guidelines for Wind Retrofit of Existing Buildings. Truss designer may submit alternate criteria if supported by the relevant ICC and/or ASCE 7 codes, subject to approval for use by the BLM. See Specification

Section 061753 and 076100.

Aerial image of existing equipment shed, prior to wind damage.

See Attachment A, for photos of existing conditions.

Project Description: The contractor shall submit engineered shop drawings and calculations for new trusses, product submittal for truss straps and fasteners, product submittal for all ribbed metal roofing materials and fasteners with a standard color similar to existing, a work plan for the selective demolition and roof repairs, a waste management plan, a construction schedule. Submit sufficient detail to show truss, roof, and connection/fastener systems are appropriately sized and specified to withstand design forces, including, but not limited to, wind uplift.

The contractor will be responsible for selective demolition and removal of all existing roof materials from the building. Metal roofing in good condition may be salvaged and remain on-site, all wood and other building materials shall be disposed of offsite. The contractor shall perform the roof repairs in accordance with the

Government approved work plan, approved shop drawings, and in conformance to the codes and standards identified as well as any local building ordnances.

Project Scope:

• Selective demolition of existing metal roof and 4 damaged trusses.

• Fabrication and installation of 16 new wood trusses (where trusses are missing / damaged)

Equipment Shed

• Installation of new hurricane truss ties on new and existing trusses, upgrading the original truss ties used. Each truss shall be secured as described in 061753

• Installation of new ribbed metal roofing, ridge cap, and trim as required, similar to original profile and color and meeting the wind uplift performance requirement in

Specification Section 076100. New roofing shall be installed over the entire structure, including over areas where existing trusses remain in place; no portion of the existing metal roofing shall remain.

• Secure existing east wall siding to wood purlins and new truss. Blocking as required.

Refer to the following specifications:

011000 – Summary

017419 – Construction Waste Management

024119 – Selective Demolition

061753 – Shop Fabricated Wood Trusses

076100 – Sheet Metal Roofing

Contractor shall be responsible for complying with all regulatory and workplace safety requirements while performing the work.

Contractor shall provide a minimum one (1) year warranty to cover all materials, parts and workmanship of the repair and replacement project.

Physical Location: 3948 Development Ave, Boise ID 83705

Project location: Equipment Shed inside red square.

ATTACHMENT A: Existing Site Photos

Photo 1: Section of building with roof gone, looking to the Northeast. Approximately 60 feet of the building needs new trusses. Top of Header elevation is 12’- 6”.

Photo 2: Overall building condition, looking to the Northwest. Existing metal roof and ridge cap will be removed and replaced with new material.

Photo 3: Interior view of east end wall. Truss shall be removed and replaced with new material. End wall siding shall be reattached.

Photo 4: Interior view of east end wall. Truss shall be removed and replaced with new material. End wall siding shall be reattached.

Photo 5: Existing trusses and roofing on south side of building

Photo 6: Existing exterior back wall.

Photo 7: Existing east end wall exterior view

Photo 8: Existing trusses interior of building south side of building.

Photo 9: Existing trusses interior of building, looking east.

Photo 10: Existing interior trusses and roof purlins.

Photo 11: Existing roof trusses and roof looking to the north.

Photo 12: Existing interior roof trusses and west end wall, looking west.