Masonry Magazine May 2010 Page. 20
CONNECTORS, ANCHORS AND FASTENERS
Select an anchor with a compatible finish, similar to the tie assembly. Establish a minimum installed torque that meets or exceeds the applied loads. Avoid non-metallic anchors. Avoid hammer or power driven anchors, especially in hollow CMU. Check for edge distance and center-to-center distance criteria for placement and performance assurance.
Product Watch
Winged Wire Tie Brick Veneer Anchor
The WWTA anchor for residential and commercial brick veneer construction is new from Heckmann Building Products.
The low-cost anchor consists of a solid Zinc Wing, Hotdip Wire Tie, and a screw. The low profile allows the wing to be installed before bricks are laid, complying with OSHA regulations for safety.
The pintle tie allows for an overall 2 1/2 inches of vertical adjustment and is slipped into the wing by the bricklayers for placement in the mortar joints. The system complies with the ACI 530 Masonry code and the International Building Code. Seismic ties are available for seismic zones D, E, and F. IMAS
Fastener selection for metal stud
COST-EFFECTIVE CONNECTIONS to the steel stud have limited options. Preferably, self-drilling/self-tapping screws are ideal. The screw incorporates a drilling tip designed to provide a pilot hole for optimum thread engagement to the steel. Sheet metal screws, which are self-tapping require a pre-drilled pilot hole and are acceptable, however the installation method requiring two drilling operations usually limits the appeal from a cost and efficiency point of view. The performance of the self-tapping screw is also dependent on the pilot hole drill size used. A 300 series stainless steel sheet metal screw or self-tapping screw may be more cost effective than using bi-metal self-drilling tips on a 300 series stainless self-drilling screw, and possibly worth evaluating.
Screw drill tip choice
THE SELF-DRILLING SCREWS are available with different drill points. The drill point selection is based on the thickness of steel encountered. For example, in a 16-gauge stud application, a #2 (0.035-inch to 0.140-inch thick steel working range) and #3 (0.036-inch to 0.210-inch minimum steel thickness) is acceptable. The predominant screws available in
MASONRY
The Voice of the Masonry Industry
MASON RY
MASON RY
MASONRY
LEGISLATIVE CONFERENCE CRANES TRAINING
Masonry is the only magazine exclusively devoted to masonry in construction. Masonry Magazine provides the information you need to work more efficiently, safely and profitably. Sign up today for your own subscription: www.masonrymagazine.com
Contact Maria Bennett for money saving company group subscriptions. bennett@lionhrtpub.com 883 303 5639 ext. 219
18 MASONRY
May 2010 www.masoncontractors.org
The Voice of the Masonry Industry