I have a cable bundle on a solar farm running thru a CAB support system. I have seen the quarion of 1.2*sqrt(D^2*number of cables in bundle). Can anyone tell me where this equation came from? Also, would it be realistic to use this to determine the diameter of a cable bundle if it is not a...
I am leaving a 2’-0”x 6’-0” opening in a foundation for conduit stub ups. These will not be encased in a ductbank, but in individual tubes coming up. How are the openings filled in after conduits are placed? Thank you.
I have designed a small concrete trench. 10” wide walls with height of 1’-6” and 1’-0” clear between walls. Base is 8” thick. Grating will be on top of the trench. Trench length will be around 25’-0”. I am use to having the base poured first, then coming back with the pour for the walls. My...
I am designing an equipment foundation and anchors for a piece of equipment. In Risa 3D, I have located the anchors and drawn a vertical rigid link from center of foundation to top of concrete distance, using a fixed end condition at the node which would be at the center of the foundation...
I am creating a fence post concrete foundation that sits on grade. Fence is chainlink with 6ft height and 10 ft post spacing around a construction site. Fence is permanent, but no excavation is allowed (landfill). I have applied a wind load and a 200 lbs point load at top of post. Questions:
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I am designing a steel platform with 2 C12 stringers coming down to a concrete landing. What end boundary and end conditions should be used for stairs. I have a pinned connection at the top of the stringer and at the bottom, i have reactions in the Y and Z (assuming stringer runs along the Risa...
When checking Hilti anchors in Profis, it is drastically conservative on shear when grout is used. Typically, I use 80% of the strength of the anchors without grout. Is this a common problem?
