Airfield Blast Shield

1.1 PROJECT DESCRIPTION: 1.1.1 Work under this project shall consist of providing all plant, labor, equipment, appliances, materials, and performing all operations required to cover the fabrication and erection of new Blast Deflector Fences for the B1-B. All work shall comply with the contract specifications and shall be in accordance with the latest International Building Code (IBC), National Fire Codes, Unified Facilities Criteria (UFC), Engineering Technical Letters (ETL s), and all applicable Federal, State and local regulations/codes. 2.1 GENERAL: 2.1.1 The blast deflector shall be of the curved, non-perforated, galvanized, corrugated type, with corrugations running in a horizontal direction. The Lynnco Type GS-20-2 as manufactured by Blast Deflectors, Inc shall be considered as the standard for this work. At the option of the Contracting Officer, alternate types of blast deflectors may be considered provided the drawings and specifications of alternate types are approved by Contracting Officer. The blast fence shall be furnished and installed by a manufacturer/contractor with blast fence experience. The blast fence shall be capable of withstanding the afterburner throttle at 30,000 lbs thrust of a B1-B Bomber engine nozzle 90 ft/ (min.) from front of deflector foundation. Extrapolated temperature is approx. 1400 ? velocity @ 900 MPH. 2.1.2 Haul Route: Approved haul route is from the Tye Gate, Third Street, Ave E, Second Street, to Flightline. Haul Route subject to change based on Flightline Restrictions. Contractors are required to use the Tye Gate for all access. 2.1.3 Construction Storage Yard & Contractor Limits: Contractor shall store all equipment and material within the designed laydown yard. Contractors shall restore this area to pre-construction conditions. Regardless of the area, the yard shall be fenced. Contractor shall keep the fence well maintained and the site clean and mowed. Contractor shall obtain approval for any project limits changes prior to construction commencement from 7 CES through the Contracting Officer. The approved laydown yard will be provided at the pre-construction meeting. 2.1.4 Contractor shall provide material submittals for all materials & products used in the project on an AF Form 3000. All PDFs shall be from original electronic documents; no scans allowed due to file size. 2.1.5 Work is located in a restricted area. The contractor shall submit a two-week schedule to the Escort POC at least one week prior to work starting to ensure escorts are assigned. The schedule should include start/end times for each day, crew sizes, and work locations. 3.1 BLAST DEFLECTOR CONTRUCTION: 3.1.1 Structural frames which support the deflecting surface will be of structural shapes, rolled, punches, and prefabricated for bolting together at site. Deflecting surface will be of galvanized corrugated steel with a minimum of 2 oz. zinc coating per Fed. Spec. WW-P-00405. Sheets shall have a section modulus of not less than 0.0163 inches curbed per inch and shall be of corrosion resistant material with yield point in 50,000 psi range. 3.1.2 All bolts subject to blast temperatures shall be of SAE 1038 steel, heat treated. All nuts, except on anchor bolts, shall be made of all-steel, self-locking type. 4.1 BLAST DEFLECTOR ANCHORAGE 4.1.1 Blast Deflectors shall be installed on existing concrete. Existing concrete has a minimum thickness of 16 . Lynnco "Epoxy-Locked" anchors, with Lynnco No. 22 Epoxy Resin were used to lock in place the existing blast deflectors. 5.1 BLAST DEFLECTOR ASSEMBLY: 5.1.1 All components will be assembled by bolting together with flat washers, under heads and nuts. Welding, brazing or burning of holes is not permitted. All nuts and bolts will be tightened to torques specified by manufacturer. 6.1 BLAST DEFLECTOR FINISH: 6.1.1 All bolts, nuts and washers will be cadmium or zinc plated. All structural members, parts, and corrugated metal will be hot dip galvanized with a minimum coating of…