I have a lightly loaded secondary beam with welded clips each end (to a beam webs). The clip is welded on 3 sides, so not detailed as simple shear connection. Design for moment of eccentricity of the beam reaction and/or beam moment of fixed beam (wl^2/12)? Checking both but looking for...
I'm checking sliding (due to wind) of a temp. guardrail system on a membrane roof. The bases are coated with rubber, so it's rubber on rubber, but could be wet. I'm looking for opinions on a value for the coefficient of friction. Thanks.
I'm performing an analysis of an existing pallet rack system. The beam to column connection is a "teardrop" boltless connection. The connection needs to take some moment for seismic forces in the longitudianl direction (parrallel to thespan of the beams). A previous set of calculations limits...
An existing building (built in 1950's) is framed with structural steel with the deck consists of 8" deep by 16" wide Flexicore planks with 2" topping. On the existing drawings the LL is either 100 or 200 psf. There is a plank schedule. An example from the scedule is plank mark followed by...
The commentary in AISC 13th states that for realistic deflection calculations Ieff should be taken as 0.75*Iequiv. Does this mean multiply Ieff as calculated per Eq. C-I3-3 by 0.75? Does Iequiv = Ieff? Reference pages 16.1-308 to 16.1-309. There is also an option to apply the 0.75 factor in...
Does anyone know of any references for the effects of deck openings on composite steel beams (or have any opinions)? I have a copy of a 1996 article by K. Wiesner from Modern Steel Construction.
RAM appears to force beams to act as non-composite when there is an opening on boths sides of a...
Does anyone know of a website to get a copy of BOCA 1984 building code (9th edition, I think)? Not much luck on recent internet searches. Even local libraries (MA, RI) appear to only have 1987 and later.
Have existing roof rafters that are notched at an interior knee walls about 6 feet from the base of the rafters. The architect wants to move those knee walls "outward" to 4 feet from the base. Any recommendations on notch repair? Any design/detail references?
I'm considering plywood on one or...
When a wood beam is notched to receive floor joists, how is the beam analyzed? Are revised section properties used based on the section at the notch (I or inverted T depending on the notch)?
