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I'm designing a 6 inch thick 6'x4'x7'deep concrete structure to hold water. The structure will be burried into the ground with only 6 inches sticking out of the ground. Construction will be pouring the slab first, then pouring the walls, creating a cold joint. Will this cold joint leak a lot of...

Has anyone used Kalmatron KFA as an admixture in structural concrete? They say that it alone has been used to make water proof swimming pools.

Can anyone explain to me how and what flexural stiffness as used in the AISC 13th edition on page 16.1-426 under torsional bracing is? From my understanding, flexural stiffness is just EI, how is it that they get 2EI/L for single curvature and 6EI/L for double curvature? And also, if possible...

I'm designing a carport type of structure in California using 4 10 foot deep piers supporting columns that support a roof. In the IBC section 1808.2.5, piers are required to have lateral stability by connecting at least 3 piers. Wouldn't the soil surrounding the piers provide lateral stability...

Can anyone explain to me why skin friction and bearing strength of a pier type footing can't be used together according to the CBC 1808.2.8.4?