Are there any concerns with the use of fly ash in concrete for a tank that will be storing potable water? We have a project that is trying to be as "green" as possible and would like to use a high fly ash content in the concrete. Knowing that fly ash -even that rated as non-hazardous- can...
We are designing a building with structural steel framing, open web joists and metal deck at the roof. The architect wants to pitch steel in two directions to achieve a 1/4" per foot slope. Does anyone have a feel for how much warping can be tolerated in the joists before it becomes a...
