When installing a frame into an existing concrete wall, the frame will have to be "punch and dimpled" and have expansion bolts supplied. Make sure you get the correct size when you receive your product. The 5" bolts are good for a poured slab wall but if you try to use these in a block wall that is not filled inside the block, they will be a bit too long and the expansion part will extend into the hollow part of the block and will not grab anything. The 4" bolts are needed in this case.
Dec 11 2015, 09:01 in HM Frame Anchors
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