Section 1620.2.5 states we must design the diaphragm for the force Fp = 0.2I*Sds*Wp + Vpx, where Vpx is defined as:
"The portion of the seismic shear force at the level of the diaphragm, required to be transferred to the components of the vertical seismic-force-resisting system because of the...
On a job I am working on, the electrical eng wants to run conduit through our composite slab. It is 3" deck with 4 1/4" concrete over the deck with 3/4" DIA. 6" long studs. In areas where conduit runs, he shows each flute with 2 1" DIA conduits running parallel and on top of each rib anothe 2 1"...
The building I am workign on has a significant portion of the building cantilevered out. We have created 3 large trusses that carry this cantilever slab, that look like giant P's. Since the cantilevered portion of the floor is longer than the backspan, we have significant uplift on the first...
I have to design a concrete slab, one-way, that acts as a loading dock floor and ceiling to a transformer vault. This slab must be designed for a uniform live load of 600 psf or a wheel load of 16kips, which ever causes the greater stresses, per the transformer manufacturers specs. The thickness...
When designing braces in your lateral system, is it acceptable to apply a length reduction factor to account for the shortening of the braces due to large gusset connections rather than using the work point to work point distance? With some of the gusset connections in the building I am working...
I'm reviewing shop drawings for a building our company provided the engineering services for. The detailer has provided extended shear tabs for all direct shear connections at beam/girder webs as well as column webs. Where we have a cantilever, there is a weak axis moment connection. It is a...
If I am interpreting the code correctly, Chapter12 - ASCE-7 '05, if my building is in category B for the table 12.3:
12.3-1
I need only consider numbers 1a, 1b, 4 and 5, and I may neglect numbers 2 and 3. And if I happen to have any of these irregularites, I must only abide by the sections...
Has any exported their REVIT model to ETABS? I have been trying by route of REVIT to DXF to ETABS, but when I import the DXF to ETABS either nothing shows up, or only 4 corner columns and a diaphragm appear. Is there a special software needED to make the link? Also, is it possible to create a...
