In a typical metal deck diaphragm, the ends of each deck sheet are overlapped over a supporting member to create deck/diaphragm continuity. When acoustic deck is used, the perforated sheet on the underside of the deck makes it impossible to overlap the deck, so sheets are simply butted...
I have a project where the contractor has been "floating" or "wet sticking" anchor bolts and wall dowel bars into the top of a concrete foundation. I know that ACI 7.5.1 does not allow this for dowel bars, but I have not been able to find anything regarding requirements for placing anchor bolts.
I am designing a two story ordinary braced frame in Iowa, that is governed by wind load. I remember seeing something about needing to design the beams in a chevron braced frame to be able to support their trib loads without using the chevron braces as a support point (effectively cutting the...
I am designing foundations for a PEMB. The issue that we're running into, is that the geotechnical report indicates there are potentially expansive clays under the slab and that the slab be separated from the foundations. This is typical for most traditional buildings that we have done in the...
I am designing a 3-story, L-shaped, CMU building with hollowcore floors. The building also has a CIP basement. The grade varies along the exterior of the building so that the basement walls are partially exposed (roughly 3' to 4' maximum) in some areas. The building is essentially two 58'-0"...
I am designing a exterior concrete basment stair that has epxy coated rebar but would also like to use epoxy adhesive to drill/epoxy the bars into the face of the supporting wall. Are there any issues or strength reduction with using epoxy adhesive on epoxy coated rebar? It is mainly a shear...
Does anyone know where I could find information on the design of a single member arch?
We designed intermediate support for a fabric awning on an outdoor canopy structure with tubes at roughly 2' o.c. bent to a 10' radius. During construction flat steel straps which were bent to radius were...
We are designing a dorm with 8" precast slabs and the mechanical engineers want to use in-floor radiant heating in the topping slab.
Does anyone have any experience with this or know where I could find any information on whether or not the topping slab can still be considered a composite...
I’ve read previous posts about limitations on concrete pour lengths in concrete tanks, but I haven’t found anything regarding standard foundations. I have a project under construction using concrete trench footings and standard wall footings. We require construction joints at a maximum spacing...
I am designing a 2-story building that is retaining soil on one side and I am trying to determine the greatest load combination to the shearwalls.
The wind load into the floor diaphragm is just slightly greater than the seismic load into the floor diaphragm at the 2nd floor level (neglecting...
Where can I find information regarding the effects of electrical conduit inside structural CMU walls? A contractor wishes to run the conduit horizontally in the wall, which would obviously cross through the grouted cells. They also want to place vertical conduit in cores that are to be...
