Page 4 of Concrete Fasteners Catalog by Concrete Fastening Systems

2 p 888.498.5747 f 216.391.5352 www.confast.com THUNDERSTUD LENGTH IDENTIFICATION SYSTEM TECHNICAL DATA ANCHOR DIAMETER (in.) EMBED. DEPTH (in.) Torque Ft/Lb 2000 PSI 4000 PSI 6000 PSI Tension (LB) Shear (LB) Tension (LB) Shear (LB) Tension (LB) Shear (LB) 1/4 5-10 1-1/8 1-3/4 2-3/4 1170 1841 1975 1443 1443 1443 1771 2408 2748 1813 1813 1813 2773 2773 2830 2635 2635 2635 3/8 25-30 1-1/2 3 5 1631 3229 4075 4318 4318 4318 3636 5653 6328 5121 5121 5121 4448 5975 6360 6232 6232 6232 1/2 50-60 2-1/4 4 6 3999 6336 6902 7419 7419 7419 6714 8942 10175 9377 9377 9377 9616 10192 12064 9888 9888 9888 5/8 75-90 3-3/4 5 7 4999 8854 9381 8264 8264 8264 8747 15590 16710 12928 12928 12928 9760 19802 17732 16373 16373 16373 3/4 150-175 3-1/4 6 8 6638 10084 11170 12504 12504 12504 11314 18408 19805 17050 17050 17050 16230 21092 22522 22965 22965 22965 7/8 200-250 3-7/8 5-3/4 8-3/4 8392 12064 12784 18250 18250 18250 16354 18250 16850 20234 20234 20234 16801 23404 25575 23980 23980 23980 1 250-300 4-1/2 7-1/2 10 9773 11890 15590 23617 23617 23617 18250 26726 30491 27605 27605 27605 27460 34960 37840 28909 28909 28909 1-1/4 400-450 5-1/2 7 10 17550 21050 27893 32275 32275 32275 22971 27845 34788 42690 42690 42690 32368 48366 61272 55566 55566 55566 ANCHOR SIZE HOLE SIZE MINIMUM EMBEDMENT STANDARD THREAD LENGTH EXTRA THREAD LENGTH 1/4 all sizes 1/4 1-1/8 3/4 3/8 x 2-1/4 3/8 1-1/2 7/8 3/8 3/8 1-1/2 1-1/8 1/2 all sizes 1/2 2-1/4 1-1/4 *1/2 x 7 1/2 2-1/4 1-1/4 4 5/8 all sizes 5/8 2-3/4 2 *5/8 x 7 5/8 2-3/4 2 4 *5/8 x 8-1/2 5/8 2-3/4 2 5 3/4 all sizes 3/4 3-1/4 2 *3/4 x 7 3/4 3-1/4 `2 3-1/2 *3/4 x 8-1/2 3/4 3-1/4 2 4-1/2 7/8 7/8 3-7/8 2-1/4 1 1 4-1/2 2-1/4 1-1/4 1-1/4 5-1/2 3-1/4 *These anchors come with the standard thread length or with the extra thread length Values shown are average ultimate values and are offered only as a guide and are not guaranteed. A safety factor of 4:1 or 25% is generally accepted as a safe working load. Reference should be made to applicable codes for the specific working ratio. *Tested by ATEC in accordance with ASTM E488-90 and ICBO Minimum embedment for satisfactory anchor performance is 4-1/2 bolt diameters. Deeper embedments will yield higher tension and shear capacity.

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