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RE: Out of Plumb Trusses[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
- Subject: RE: Out of Plumb Trusses
- From: William Keil <WJK(--nospam--at)brph.com>
- Date: Tue, 31 Aug 1999 09:45:57 -0400
My experience (guess) tells me that these trusses were warped during shipping or were stored incorrectly at the jobsite. Whenever encountering such a situation in an existing building, I have required additional continuous solid blocking be installed at the top and/or bottom chords as required (or desired so you can sleep easy at night) to prevent the local buckling failure of one truss. The blocking helps keep all of the trusses in their as-built position and reinforces the diaphragm bracing action of the plywood roof sheathing. William J. Keil, P.E. -----Original Message----- From: Robert Fennema, P.E. [mailto:bobfennema(--nospam--at)home.com] Sent: Tuesday, August 31, 1999 9:22 AM To: seaint(--nospam--at)seaint.org Subject: Out of Plumb Trusses I have a client who is considering the purchase of a 60 odd unit apartment complex. There are six buildings all two story. They were complete in 1984. When inspecting the roof framing, I found several dozen trusses that are out of plumb. I found panel points up to 5 inches off center. There are also top chords that are misaligned between panel points. The truss span 48 feet and have an intermediate support point at the mid span over the partition between the units. The roof sheathing is 1/2 plywood. The lower chords are supported by gypsum drywall on resilient channels. I am convinced that the rooof framing has not moved as the these conditions are random. In some cases a truss will lean east while the adjacent one leans west. According to the City records, the tusses were designed by Truswal but I do not know the local supplier. How can I evaluate the significance of these conditions? How can these conditions be repaired since removing the roof sheating is not very practical?
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