Vol 2 - Garney Construction

C. Minimum Bolt Size: 1/2-inch diameter by 12 inches long, unless otherwiseshown.3.03 CONCRETE AND MASONRY DRILLED ANCHORSA. Begin installation only after concrete or masonry to receive anchors hasattained design strength.B. Install in accordance with manufacturer’s instructions.C. Provide minimum embedment, edge distance, and spacing as follows, unlessindicated otherwise by anchor manufacturer’s instructions or shown otherwiseon Drawings:AnchorTypeMin. Embedment(bolt diameters)Min. Edge Distance(bolt diameters)Min. Spacing(bolt diameters)Wedge 9 6 12Expansionand Sleeve4 6 12Undercut 9 12 16Adhesive 9 9 13.5D. Use only drill type and bit type and diameter recommended by anchormanufacturer. Clean hole of debris and dust with brush and compressed air.E. For undercut anchors, use special undercutting drill bit and rotary hammerdrill and apply final torque as recommended by anchor manufacturer.F. When embedded steel or rebar is encountered in the drill path, slant drill toclear obstruction. If drill must be slanted more than 10 degrees to clearobstruction, notify Engineer for direction on how to proceed.G. Adhesive Anchors:1. Do not install adhesive anchors when temperature of concrete is below40 degrees F (25 degrees F for Simpson Strong-Tie Acrylic-TieAdhesive) or above 100 degrees F.2. Remove any standing water from hole with oil-free compressed air.Inside surface of hole shall be dry where required by manufacturer’sinstructions.3. For hollow-unit masonry, install screen tube in accordance withmanufacturer’s instructions.4. Do not disturb anchor during recommended curing time.PW/WBG/382059METAL FABRICATIONSAUGUST 15, 2012 05 50 00 - 19©COPYRIGHT 2012 CH2M HILL