Jacking Of The BRB’s On Wilshire Grand

Last Monday and Tuesday we pre-compressed the upper buckling restrained braces (BRB’s) between levels 70 – 73 in four equal increments to a total compressive force of 1050 kips (1.05 million pounds) per brace.  We performed this work slowly over two days to provide the structure adequate time to respond to these loads.  We measured the lengths of these braces […]

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