Deciphering the code:
I am using RISA 3D to design a 5' high x 18' sq steel equipment platform in SDC D. I want to use a non-concentric braced framed frame system amounting to "knee braces" off the column base to the beams at 45o angle. I found that in AISC 360 C1.3a such a system is to be...
Q: If I add L's or C's below a raise slab to compensate for cut rebar, have I done any good? Assuming this is the tension face have I not just weakened it further by adding mechanical anchors.
I have a project at an old 1926 storage facility building (in a high seismic zone). A cellular...
I'm working on a project with an exposed mat foundation - 30" thick. It will be subject to freeze thaw cycles. I plan on using 3000 psi w/ 7% AE. I have a few questions on what more I can do to ensure durability.
[ol 1]
Would a concrete sealer be of help for the slab?
And, I will need some...
I've designed an OCBF equipment platform in the Tahoe area where the snow load is 230 psf. While the "X" bracing utilizing L3x3's works well for the lateral design (as tension only or Euler buckling members), if I consider the compression they would "see" in the D+S case they are overstressed...
Hello All,
I have a project on tribal lands in Nevada where BLM is insisting on no soil disturbance i.e. NO foundation!!!.
This site is on a mountain top where high winds have ripped some existing equipment from their anchors. So, this time they came to an engineer for a design
The new...
I (sole proprietor) work in the cellular industry where the catwalk rails of elevated water tanks are often used to hang antennas. These antennas that once weighed as little and 14 lbs each, now weight 97 lbs with pipes and mounts. With 3 carriers x 4 antennas each, failure has occurred on one...
As a solo engineer I appreciate this site immensely and today I need some advise on a contractor's idea.
He wants to completely chip way the concrete over a 10"x48" area against the wall of a parking garage floor to reveal the steel in the floor. After identifying the steel that can be cut and...
I'm facing a "new to me" problem and I would appreciate peer review on this approach:
I have an irrigation canal that needs to cross a drainage canal - clear spans 70‘. The plan is to pipe the water across with two 42" dia steel pipes. See attached drawing.
I've encorporated a...
