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BigH: Clayey soils near the surface, underlain by sandy silts and silty sands that transition to PWR and then down to screaming hard bedrock. Bedrock elevation varies roughly 60' across the site - some blasting is now being performed in one corner of the site where rock is about 10' above the...

It is a permanently dewatered site, with pumps running continuously I would assume (tho as structural engineer we did not design the dewatering system). The hole is 60 feet deep and 320'x320', so you can imagine the lateral earth pressures on the permanent shoring wall if you were to consider...

We do have drilled piers but it is not required by Code to design the slab on grade (or the structure) to resist hydrostatic pressure if you have a dewatering system installed (not to mention it would be impossible to convince the owner to spend another million dollars for a dual system). We're...

We're designing a building with a 5 story basement, and the lowest level will be roughly 30 feet below the water table. There is a permanent dewatering system for the project including an underground drainage system. The footprint of this building is huge (about 320'x320'), and the levels below...

I don't think you would ever come close to developing the strength of a post-installed anchor. The controlling factor will be the brick/mortar strength which can be assessed through shearjack tests (for shear) and flatjack tests (for compression).

My wife wanted to put a pool on my elevated wood deck so I checked the deck for what it would support. It will only support 6 inches of water before it, theoretically, is unsafe. The critical element to check is probably the joist support to the house. Install some Simpson hangers if you don't...

Adding a steel beam to solve this problem is not a recommended solution unless you're supporting the USX building in Pittsburgh. First, recheck your shear calculations - you footing thickness is inadequate. Second, solve your uplift problem by increasing your footing thickness and/or...

If you do not have net wind uplift on the joist and have accounted for the proper column "brace" point as I think you have, bottom chord joist extensions are not required (not sure about the OHSA requirement given above, I'll have to look into that).

The closer to "square" that you make your panel elements, the more accurate the results will be. Aspect ratios cited by CSI (SAP) are good recommendations. Most importantly though, be consistent as possible with your mesh. Localized regions with poor aspect ratios will be less susceptible to...

Samo, Yes, this must be considered in the design if women will be parking in the facility. Fun aside, the column must be designed to resist vehicular impact unless there is no way for a vehicle to hit the column. You will find that tightly spaced column ties are required in the lower half of...

The is the perfect situation for the light gauge specialty contractor to design ganged light gauge "jambs" and a light gauge box header across the opening. You can screw attach a lintel angle to the light gauge header for brick support. Welding is possible, but special welding techniques must...