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Posted: Fri Aug 20, 2004 8:23 pm Post subject: Rehab Code
Some more thouhts on the rehab code
Sec 188.8.131.52(d) –“ All infill walls shall have a positive connection to the frame to resist out-of-plane forces”. The commentary elaborates that this positive connection could be a “fully grouted bed joint in full contact with the frame or complete encasement of the frame by brick masonry”!
Reading the main clause I would have thought the code would mean dowels sticking out of the column or beams and embedded into the wall. But this is entirely different. What is the reason that UBC, IBC and other advanced codes (of seismic sensitive countries) have never allowed unreinforced brick masonry. Are we intending to give this practice a clean chit? Are we missing something?
Under dynamic conditions does the bond between mortar and concrete still hold good (knowing they are never monolithic and an old to new cementatious material discrepancy almost always exists).
And what good are brick jackets on concrete columns.
Are there any tests that substantiate these clauses and why aren’t international codes embracing this practise as well.
Sec 7.4.3 & Table 3--Does not talk about effect of lintel bands for height to thickness ratios
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