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I have the structural drawings for a two way slab and the rebars are called out as 10MB, 10MP, 10MC, 15MT... Any ideas what these letters represent?

Does anyone have any ideas what kind of insect could have done this damage? The building is in Ontario east of Toronto.

What code should be followed for designing pedestrian/trail bridges in Ontario/Canada

I have a concrete tank that needs a leak test done. The leak test will be done after its already been backfilled and the tank is 21m by 21m and holds about 3000m3 of water. Wall thickness ranges from 600mm at the bottom to 450mm at the top (7.1m tall). My question is once the tank is filled up...

I have a concrete tank that needs a leak test done. The leak test will be done after its already been backfilled and the tank is 21m by 21m and holds about 3000m3 of water. Wall thickness ranges from 600mm at the bottom to 450mm at the top (7.1m tall). My question is once the tank is filled...

I have a stacked stone gravity retaining wall with 10 degree sloped backfill. What height of backfill do I use to calculate the soil pressure on the wall? http://files.engineering.com/getfile.aspx?folder=cf6384ec-7517-45e9-b130-21f0dfc455ed&file=20110324135231.pdf

I have a stacked block gravity retaining wall with a 10 degree backfill slope. When I am calculating the pressure on the wall from the soil what height of backfill do I use? http://files.engineering.com/getfile.aspx?folder=a82a355d-6fd6-45bf-b103-6a682faa3f36&file=20110324135231.pdf