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ClarkDietrich HOLDOWN (CD SERIES)

ClarkDietrich HOLDOWN (CD SERIES) - SECURE AND HOLD DOWN SHEAR WALLS TO THE STRUCTURE FOUNDATION

ClarkDietrich holdowns provide cost-effective shearwall attachment and are used to transfer tension loads between floors or from structural members to the foundation.

Two-piece welded construction comes in three sizes for optimal performance. Installation is made easy with prepunched holes.

Coating: G90

Material: 7 Gauge (179mil) with 1/2" bearing plate

ASTM: A36, A1011

Anchor hole size:
7/8" x 1-1/8" for CD8 & CD10
1" x 1-1/8" for CD15

Installation

Install the holdowns using anchor bolts or alternate anchorage calculated to resist the tension load for your specific application.
Use steel nylon locking nuts or thread adhesive to minimize the chance of nut spin. Anchor bolt washer is not required.
Secure the CD holdown to the steel framing member by filling all the prepunched holes with #14 screws to achieve listed capacities.
Boundary members (back-to-back studs) shall be designed by a qualified professional. To tie back-to-back stud members together, the Designer must determine the fasteners required to bind members to act as one unit.
CD holdowns can be welded per Designer's recommendation and specification.
Welding procedures shall be qualified as specified in AWS D1.3.
Welded connections used for cold-formed steel structural members in which the thickness of the thinnest connected part is 0.18 inch or less shall comply to AISI S100-2012 specification Section E2.

Reference section R603.9.4.2 of the International Residential Code (IRC) for holdown requirements in residential applications. Consult the engineer of record for commercial applications.