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Does anyone have a feeling on the cost impact (per anchor) of installing cast-in-place anchors vs. doing it later with mechanical wedge anchors? Strength constraints aside, The testing requirements on the latter have to factor in, as well as the additional cost of the material itself. But is...

I have an existing concrete shear wall. There's a proposal to core out some holes. The California Building code requires a full upgrade of the wall if the wall's capacity is decreased by more than 5%. Let's say the wall is 7" thick, 10'-0" long, and the hole penetration is cirular with a...

I've been using Google Earth to obtain latitude/longitude coordinates and entered them into the USGS software to determine Ss and S1. Does anyone have a guideline as to the number of significant figures to use? For example, I've looked at the following coordinates: 37.70N, 122.14W. If I...