Thanks for the informations. I am still searching for tensile stress of the steel used to make the Macomber joist. It looks like cold formed steel but at that time of 1957 i could not exactly find the tensile stress used fpr the perticular Macomber joists.
Does anyone know where I can find the design information of the old Macomber Steel Joists? I am working on a project the structure was built in 1957 with Macomber joists. now the owner want to install RTU's on the roof. I am trying to verify the adquacy of those joist to handle the new loads.
Thanks. I am in the same page with you. But I am seeking for some structural backup to justfy as it will be a considerable cost to r/f the whole 12' thick disc.
Hi
the defects will depend on how the slab was designed and detailed. For example, if the designer has a good factor of safty in his calculation then nothing will happen immediately. If is was designed marginally for the expected loading, then the steel reinforcing will get yields when loading...
Hi
I am designing a 12'-0" thick reinforced concrete anular concrete base to carry the sanitary structure on that. The anular base is supported on a shaft at its inner diameter. the shaft inner diameter and my concrete base inner diameter is 52'-0" and the outer diameter of the concrete base...
Hi
Is anybody familiar with "Tracked crane loading" on slab on grade. I am designing a parking slab on grade space for tracked crane. If you can help me to find the load distribuion of a tracked crane on slab on grade it will be helpful to me.
Hi colleges,
I am trying to find suitable load test method for auger cast pile bearing on sand and granular material. and the piles were designed for skin friction and endbearing. throughout the pile lenth we mainly have sand and silty san mix.
I have suggested Cyclic method but the contractor...
