I looked through my AISC manual, and AISC Detialing and can't find the clearance required to get a good weld. How much room is required for the welder to see and access a weld?
Currently I have a condition where we want to add to a W8 that supports a roof deck without cutting the deck. My...
OPG Engineers were all in a union (wich is why they all got nice golden handshakes) Bu they were lumped in with everyone else working for Ontario Power Generation.
carl, you are absoulutley right. Not sure if the floor is steel or concrete, if steel with grating locate some filler beams below the equipment, if concrete add a concrete pier to keep the baseplate off the floor and spread the load at the same time. Check punching shear around the new pier.
A square slab will have two way action. However if you are unsure about locations for openings for future services, or are short on time, you can design as a one way slab. This approach is very conservative.
To design for a two way slab consult a text on plate theory. "Moments and...
I assume your walls are shear walls? If they are the highest compression loads will be coming with wind or quake loads.
Usually I do a simple hand calc to estimate the thickness of the slab required. Assuming you foundation slab is ridgid and determine the soil pressure using the ridgid slab...
I think the question of using load factors and bearing capacity is a lot simpler than discussed above. Bearing capacity is governed by deflections. You do not apply load factors when calculating deflections whether you are working with steel, concrete, or soil.
This provision is also in the candian code. I beleive that this is the limit for crushing of the concrete, regardless of how much steel is added. You can try adding a capital around your columns, or adding a thickened slab under equipment bases to increase your shear resistance locally.
Please help solve a debate regarding the sehar resistance of slabs and walls without shear reinforcement. Should Vc be reduced if the slab is thicker than 300mm? I was using Vc=2root(f'c)bwd for the shear capacity of large slabs.
