All installations should be designed only in accordance with the allowable load values (allowable stress design) or design strength values (ultimate strength design) set forth in this catalog. The allowable load is the maximum static service load that can be imposed on an anchor and is based on dividing the ultimate load by a factor of safety. Ultimate loads are determined from average test results and calculations and are guide values. Due to variations in base materials, site-specific testing should be performed if the actual performance in a specific base material must be known. Unless otherwise noted, data in this catalog reflects testing in unreinforced materials or materials with reinforcing positioned so that it does not influence anchor performance.

Some ultimate and allowable loads (e.g. steel strength of threaded rods, rebar dowels, etc.) are determined by calculation without testing. Anchor tests are performed in accordance with accepted standards and/or engineering judgement, but are not performed on connection systems in buildings unless specifically stated. For information regarding how specific products are tested, contact your Simpson representative or contact the company.

Cyclical testing has been performed on some anchors to confirm suitability for resisting wind or seismic loads. An allowable stress increase (or decrease) may be applicable to these anchors if indicated in the table footnotes. These adjustments are based on using the Alternate Basic Load Combinations of the UBC and IBC. Other building codes may treat use of allowable stress adjustments differently.

NOTES:

1. For threaded rod, allowable tension based on steel strength = 0.33 x Fu x Nominal Cross-Sectional Area.
2. For threaded rod, allowable shear based on steel strength = 0.17 x Fu x Nominal Cross-Sectional Area.
3. For Grade 60 rebar, allowable tension based on steel strength = 24 ksi x Nominal Cross-Sectional Area.
4. For Grade 60 rebar, allowable shear based on steel strength = 0.17 x Fu x Nominal Cross-Sectional Area.
5. Fu = 58 ksi (A307, Grade C).
6. Fu = 125 ksi (A193, Grade B7).
7. Fu = 100 ksi (304/316 Stainless ≤ 5/8 inch diameter), 85 ksi (304/316 Stainless ≥ 3/4 inch diameter).
8. Fu= 90 ksi (Grade 60 Rebar)