The SMSA is a corrosion resistant, die cast machine bolt anchor with a single internal expanding cone for use in concrete, concrete block and brick.
The DMSA utilizes the same basic anchor design as the SMSA but with double expansion cones to provide higher loads and better performance in base materials of questionable strength.
GALLERY: roll over images below to see larger image
SMSA
DMSA
MATERIAL
Die cast Zamac 3 alloy.
CODE REPORTS
- DMSA Meets Federal Specifications A-A-1923A, Type 3, except DMSA25 and DMSA31.
- SMSA Meets Federal Specifications A-A-1923A, Type 2
INSTALLATION
See below.
LINKS:
SMSA Product Data
1. Machine bolt is not included.
SMSA
SMSA Tension Loads in Normal-Weight Concrete
- The allowable loads listed are based on a safety factor of 4.0.
- The minimum concrete thickness is 1 1/2 times the embedment depth.
- Machine bolt is not included.
SMSA Tension and Shear Loads in Lightweight Hollow CMU
- Values for 8-inch wide CMU grade N, Type ll concrete masonry units conforming to UBC Standard 21-4 or ASTM C90. Mortar is prepared in accordance with Section 2103.3 of the UBC and UBC Standard 21-15. The minimum specified compressive strength of masonry is 1,900 psi.
- E mbedment depth is measured from the outside face of the concrete masonry unit for installation through a face shell.
- The tabulated allowable loads are based on a safety factor of 5.0 for installations under the I BC and IRC. For installations under the UBC use a safety factor of 4.0 (multiply the tabulated allowable loads by 1.25).
- All holes are drilled with a carbide-tipped drill bit in the rotation-only mode.
DMSA Product Data
and Tension and Shear Loads in Normal-Weight
Concrete
- The allowable loads listed are based on a safety factor of 4.0.
- 100% of the allowable load is permitted at critical edge distance. No reduction in edge distance is allowed.
- The minimum concrete thickness is 1 1/2 times the embedment depth.
- Machine bolt is not included.
DMSA
INSTALLATION
Caution: Oversized holes will make it difficult to set the anchor and will reduce the anchor's load capacity.
- Drill a hole in the base material using the appropriate diameter carbide drill bit as specified in the table. Drill the hole to the specified embedment depth plus 1/8 " for flush mounting. Blow the hole clean using compressed air. Overhead installations need not be blown clean. Alternatively, drill the hole deep enough to accommodate embedment depth and dust from drilling.
- Insert anchor into hole. Tap with hammer until flush with surface.
- Position fixture; insert screw and tighten. The bolt must engage a minimum of 2/3 of the anchor threads.
Installation Sequence
