Dreamweaver
11-09-2007, 04:47 AM
I am finally near the end of the block laying. I have several questions that I was hoping someone could help me out with. I have 12 inch thick CMU block walls on the exterior of my addition and 8 inch on the interior surrounding the stairwell. My questions are: Do you run two horizontal rows of rebar in the 12 inch and one row in the eight inch bond beam? I have #4 60 grade rebar that I am using. Is it OK to just lay the horizontal rebar onto the Open bottom bond beam block or should I somehow support it up more? Also should the vertical rebar be bent at the top and run 40 times the bar diameter horizontally ( a lap requirement maybe). Now to make matters even more complicated I have 4 unbonded pilasters. One along each wall. The building inspector wanted pilasters on any wall that was more then 20 feet long. So I have an unbonded pilaster on each wall. Two of which will support the steel girder. Now does the bond beam go across the pilaster and tie into it with the rebar that comes up from the cores of the pilaster or should I somehow just run it across the pilaster and not bond it with the pilaster. I sure hope that didn't just confuse everybody. I have been looking for awhile now for some of these answers but nothing seems to go into such depth. So any help would really be appreciated. One more question. Since I have Open bottom bond beam blocks, what is the best way to keep grout from going in the cores that I do not want grout in? I used wire lathe on the 8 inch. Are the holes small enough not to let the grout pass through? I was going to use a combination of Closed bottom bond beams and open until I lifted a closed bottom bond beam. And I thought the L block were heavy. So I wimped out and got the Open bottom only. Thanks for any help.:confused: