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Thanks, your comments are very helpful. By the way we do not have any ceiling joist, so the collar ties will take horizontal thrust loads. Do this change anyone's response now? Thanks

Can anyone provide a design resource for collar tie design for rafters. I have a contractor that has deviated from the requirements of the building code. Thanks

Has anyone ever designed a steel (open sides except at the top, there is glass at the top) stair tower with shear walls at the btm level? The stair tower is appr. 50' tall. I am using moment connections/masonry shear wall(at btm level) in direction 1 and x-bracing/masonry shear wall (at btm...

There is a book called Seismic Design of Buildings & Bridges from Kaplan Education website that is very helpful and worth the money.

Does anyone have a reference for a w-shape beam to hss column moment connection? AISC said that they had one, but it is out of print now. It is included in the new steel manual but that's not availble until February, which is too far away. Please advise. Thanks.

Does anyone have a reference for designing a free-standing bridge crane system. I am not able to utilize a building column inorder to brace the runway beam/channel. So my span for side thrust loads would be 68ft which is longer than I care to have. Please advise

Can someone explain the connection eccentricity factor using the LRFD method.

Does anyone have reference material on analysis & design using knee braces for lateral resisting system for buildings. Thanks

Where can I get a copy of Butler's Foundation manual?

I am looking for reference material on designing turned down slabs for light loads. Please help. Thanks

What is the allowable weak axis bending stress for channels. Thanks