Roof expansion joints
Roof expansion joints
(OP)
I am in the process of designing a warehouse structural that has tilt-up precast wall panels and a bar joist roof with steel beam lines. The building is about 160,000 sq.ft (approx. 350'x450').
I was wondering if anyone had any information or could direct me on how often or if I need an expansion joint in the roof. Any guidance or information would be greatly appreciated. Thanks
I was wondering if anyone had any information or could direct me on how often or if I need an expansion joint in the roof. Any guidance or information would be greatly appreciated. Thanks






RE: Roof expansion joints
Refer to the National Roofing Contractor's Association for details on roof isolation joints. If the joint has to be placed such that it impedes drainage, you will have to get creative in the jointing process. I have designed "flat" isolation joints to accommodate drainage considerations.
RE: Roof expansion joints
RE: Roof expansion joints
Joints are necessary when cumulative strains are such that the system would be inordinately stressed or damaging movement would occur. While you can compute this, there are some generally used guidelines such as the one for roofing materials at 200 feet center-to-center. Joints in floors are required at much greater frequency because of the restraint conditions imposed on slabs on grade.
I would suggest you research and learn the differences between expansion, construction, isolation, and control joints. Each has its purpose, configuration, and need.
RE: Roof expansion joints
RE: Roof expansion joints
This "slip sheet" approach cuts the strain of the joint movement in half, and then attenuates the strain over an 18-inch wide section (1/2 on each side of the 36-inch sheet).
RE: Roof expansion joints
RE: Roof expansion joints
RE: Roof expansion joints
RE: Roof expansion joints
RE: Roof expansion joints