There is some discrepancy among long time engineers and new engineers in my office about development length:
The ACI 318-08 code states that equation 12-1 is the "general development lengt equation." In this equation there is a term of ((cb+Ktr)/db). The Ktr term is "a factor that represents...
We have a client that wants to build a house out of papercrete. I am not having much luck on finding information on the strength and other values for this material to find out if it is even feasible. There is a lot of information on the web about people who are building out of it, but I need to...
I need to know where the best place to locate an opening in a structural tee roof system. The mechanical engineer wants to place an 18"x36" over the joint of two tees with the long dimension running along the joint. Is this the best spot or should it be located more towards the interior of the...
My firm was hired to analyze the structural capacity of a building in our city. The owners want to use the 3rd floor as storage for paper products weighing up to 250 psf. The building is very old; we believe it to have been built in the 1920’s. There are no plans for the building save floor...
I am designing a concrete column and am trying to calculate the interaction diagrams so I can play with different sizes and amounts of steel and be able to see it visually. I have set up an excel spreasheet to give me values for Mo, Po, Mb, Pb to start my diagram off with.
The problem is not...
I am modeling a two span W8X40 beam in RISA that has simple supports and a distributed load only. I did the hand calculations and found that the beam was fine in yielding and LTB, but when I check it in RISA, the unity bending check is bad. RISA says the beam fails by Eq. H1-1b. I have tried to...
I am trying to figure out my governing load cases for the roof (joists, etc.) of a warehouse I am designing and am getting hung up on the E factor. I just graduated and was never required to determine E in school (it was always a given). I am working my way through the code and am getting hung...
