Masonry Magazine August 2010 Page. 35
MASONRY COMPUTER ESTIMATING
Masonry Computer Estimating
That Does It All... in 3D!
by TRADESMEN'S SOFTWARE
It is critical that the nine-gage wire be engaged in the clip as shown above. The anchor should be centered in the mortar joint, with mortar above and below the anchor. Anchors must be a minimum of 1.5 inches into the veneer with a minimum mortar cover of 5/8-inch to the outside face of the wall. Neither the Masonry Standards Joint Committee (MSJC) nor the International Building Code (IBC) address the issues of splicing the nine-gage wire in the veneer. The National Concrete Masonry Association NCMA Tek Note 12-6 states that wire and joint reinforcement is typically spliced six inches (152 mm) minimum to transfer shrinkage stresses. The Uniform Building Code of 1982 stated that the seismic joint reinforcement shall be continuous with butt splices between ties. When properly installed, both the backup and veneer will share the out-of-plane load in proportion to their rigidities.
Selecting the correct anchor for your wall
BENDABLE, CORRUGATED WALL TIES have been around since the 1920s. By Code, they can only be used in veneers with wood-framed backups and the veneer airspace cannot exceed one inch.
This is a photo from an earthquake test done in January 2009 at UC San Diego's Englekirk Structural Engineering Center. These corrugated wall ties were nailed to the backup. The nails pulled out of the wood studs causing failure of this wall. Corrugated wall ties should be installed with ring-shanked nails or wood screws. In another test performed by the Department of Civil and Envi-
On-Screen 3D Take-Off
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Calculates CMU: HALF and FULL BULLNOSE, DOUBLE BULLNOSE, CHAMFER, or SASH for any or all OPENINGS, JAMBS, CORNERS, CONTROL JOINTS and any SPECIAL CUTS.
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Negotiating projects with a 3D image will win you more contracts and enhance your professional image
TRADESMEN'S SOFTWARE, Inc.
1-800-494-4899
See for yourself at:
www.tradesmens.com
READER SERVICE #163
August 2010
MASONRY
33