Currently working on the design of a rectangular shaped concrete tank consisting of two 60' square tanks that share a common interior wall. It's retaining 21 feet of water, the bottom of the tank about 10 below grade, and the top is open (see sketch).
I've done several concrete tanks but none...
I'm in the process of designing my first public, FEMA approved tornado/storm shelter. It's in the southeast US and is to be designed using 250 MPH design wind loads. I've run the wind pressures and I nearly fell out of my chair when I saw the loads. I'm currently reading through the FEMA and ICC...
We are currently doing a structural analysis of the roof framing for a large dome (diameter=265'). The dome was constructed around 1965 and the roof framing consists of steel frames, rings, and secondary beams with a cementitious (Tectum) roof deck.
The primary ribs/frames are radial and...
I've got a project with a combination of A36 and A441 steel for the primary roof framing. The A441 members are limited to a select few that experience higher loads (obviously). Unfortunately, the original structural plans only call out A441 and don't specify the grade. Per Table-1 in AISC 9th...
Background:
The building is a 3-story building for elderly and handicapped on the Mississippi coast that was built in the early 1980's. The construction consists of 7" post-tensioned concrete slabs supported by CMU walls. The typical floor layout is similar to a hotel, with individual rooms on...
I'm designing a rectangular concrete tank (aeration basin) for a wastewater treatement facility. The tank is approximately 100' feet long with circular ends. There is a free-standing wall on the inside of the tank that separates the tank into 2 - 12' wide ditches. The tank will be an above...
