AG 2012 02 20 - Laserfiche WebLink

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5.2 Body Skin Thickness and Allo All sidewall, front and rear panels will be single piece .125" - 5052 -1432 aluminum with a minimum density of 1.75 pounds per square foot. The single piece body skin shall be attached to the 2" x 2" structural with interval welds spaced at 8" along the mating edge of each structural tubing member. In addition, the skin shall be bonded to each structural upright full length using high strength Chemrex CX 400 adhesive. The body side skin is welded to each corner post along the inside contact point of each corner extrusion. This method of installation provides a welded application to the entire perimeter of the body side skin, a bonded attachment to the wall substructure and an additional flexible adhesive bond for enhanced support. Alternative bonding methods that utilize liquids, caulks, tape or rivets as an attachment process for bonding the side skin to the body structure will not be acceptable. ? yes ] No Does your bid comply. 5.3 Body Structural Framing All framing will be a minimum of 2" x 2" square tubing with a wall thickness of .125" and an alloy rating of 6061 -T6. Tubing members will be spaced on minimum 12 -inch centers for optimum load and structural support. Gussets shall be added at all stress points. Gussets will be either .250" plate or 2" square tubing welded to the adjacent structural members at 45- degree angles for diagonal strength. Does your bid comply? Yes No 5.4 Vertical Corner Posts As a part of the inherent structural strength of the modular unit, the use of reinforced extruded corner post is required. The vertical posts will measure 2.75" x 2.75 ", with a 2.125" radius, a minimum wall thickness of .125" and will have an alloy rating of 6061 -T6. The extrusion shall have full - length slots for insertion of the exterior wall skin. This characteristic eliminates exposed panel edges and with the added benefit of seam sealed joints, reduces oxidation and corrosion. The slot provides an area on the inside of the extrusion /sheet junction for welding the body side skin to the corner extrusion. Additionally, the extrusion shall incorporate a full - length, integrally extruded center reinforcement rib with a minimum thickness of .200 inches and two side flanges. Rolled radius corners post, or "add -on" type covers that are not a part of the extruded vertical corner posts, shall not be accepted. Bidder must be prepared to verify compliance with this section. Drawings and samples of actual materials used may be required. The lower ends of the vertical corner posts must be closed off with an aluminum plate. The vertical corner posts and the roof corner extrusion shall be mated by a cast aluminum corner cap welded to all three extrusions inside and out. Construction, which merely welds the extrusions together, is unacceptable. Does your bid comply? Yes No 5.5 Roof The roof skin shall consist of a single sheet of .090 " — 5052 -1432 aluminum. Roof framing shall be 2" x 2" square tubing with a wall thickness of .125" and an alloy rating of 6061 -T6. These structural tubing members will be set on 12 inch centers below three (3) longitudinal full length extruded hat sections measuring V x 3" x .125" and an alloy rating of 6061 -T6. The roof sheeting shall not be required as integral part of the roof structure; however, the roof skin shall be welded to the outer extrusions using a full perimeter, continuous weld on all four sides. The roof structure itself shall be designed to enhance the safety and structural integrity of the modular body and to meet or exceed the load requirements of AMD Standard No. 001. To facilitate water dispersion, a 3/4" "crown" shall be built into the roof structure. A flat roof will not be considered. Does your bid comply? Yes No 21 Attachment number 1 F -5 Page 118