Return to index: [Subject] [Thread] [Date] [Author]
RE: Unblocked Plywood Diaphragm Deflection Calculation
[Subject Prev][Subject Next][Thread Prev][Thread Next]- To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
- Subject: RE: Unblocked Plywood Diaphragm Deflection Calculation
- From: "Jeffery Seegert (x 485)" <jbseegert(--nospam--at)matrixti.com>
- Date: Wed, 19 May 1999 13:42:29 -0400
Deflection ={(5vL^3)/(8Eab)}+{(vL)/(4Gt)}+ (.188Le)+{[(sum(DX)]/(2b)} v = shear in the diaphram (plf) L = total width of diaphram (ft) E = 1.7 e 6 Douglas fir-Larch No 1 2x8's (psi) see Table 23-I-A-1 of 1994 UBC Volume 3 A = area of top plate (in) b = diaphram depth (ft) G = 90,000 (psi) (for Exterior C-D or C-C Grade Panels) see table 23-2-J of 1994 UBC Volume 3 t = .298 (in) see table 23-2-H of 1994 UBC Volume 3 e = .031 x 1.2 =.037 see Table 23-2-K; 20% increase for non-structural I) D = 1/32 (in) X = (ft) average distance between chord splices (usually 20') There are four different areas that contribute ato diaphram deflection. They correspond to the four sections in the formula above. They are as follows: Deflection = bending + shear + nail slip + chord splice slip ______________________________________________________________________ -----Original Message----- From: David L. McCormick [mailto:DLM(--nospam--at)eqe.com] Sent: Wednesday, May 19, 1999 10:16 AM To: seaint(--nospam--at)seaint.org Subject: Re: Unblocked Plywood Diaphragm Deflection Calculation Let me know if you hear anything directly from anyone?
- Prev by Subject: Re: Unblocked Plywood Diaphragm Deflection Calculation
- Next by Subject: Re: Unblocked Plywood Diaphragm Deflection Calculation
- Previous by thread: Re: Unblocked Plywood Diaphragm Deflection Calculation
- Next by thread: Re: Unblocked Plywood Diaphragm Deflection Calculation
- About this archive
- Messages sorted by: [Subject][Thread][Author][Date]