The ASTM F1554 specification was introduced in 1994 and covers anchor bolts designed to anchor structural supports to concrete foundations. F1554 anchor bolts can take the form of either headed bolts, straight rods, or bent anchor bolts. The three grades 36, 55, and 105 designate the minimum yield strength (ksi) of the anchor bolt. The bolts can be either cut or roll threaded and a weldable grade 55 can be substituted for grade 36 at the supplier’s option. Color coding on the end – 36 blue, 55 yellow, and 105 red – helps facilitate easy identification in the field. Permanent manufacturer and grade marking is allowed under the S2 supplementary requirements.

Applications for F1554 anchor bolts include columns in structural steel framed buildings, traffic signal and street lighting poles, and overhead highway sign structures to name just a few.

Grade 36		Low carbon, 36 ksi yield steel anchor bolts
Grade 55		High strength, low alloy, 55 ksi yield steel anchor bolts
Grade 105		Alloy, heat treated, high strength 105 ksi yield steel anchor bolts

Element	Grade 36			Grades 55 and 105
	Sizes up to 3/4	Sizes over 3/4 to 1-1/2	Sizes over 1-1/2 to 4
Carbon (max)	0.26%	0.27%	0.28%
Manganese	*	0.60 - 0.90%	0.60 - 0.90%
Phosphorus, max	0.04%	0.04%	0.04%	0.040%
Sulfur, max	0.05%	0.05%	0.05%	0.050%
Copper, min (when specified)	0.20%	0.20%	0.20%	0.20%
* Optional with the manufacturer but shall be compatible with weldable steel

Grade	Size inches	Tensile, ksi	Yield, ksi min	Yield, MPa min	Elong. % min	RA % min
36	1⁄2- 4	58 - 80	36	248	23	40
55	1⁄2- 2	75 - 95	55	380	21	30
	21⁄4- 21⁄2	75 - 95	55	380	21	30
	23⁄4- 3	75 - 95	55	380	21	30
	31⁄4- 4	75 - 95	55	380	21	30
105	1⁄2- 3	125 - 150	105	724	15	45

Grade	Marking Details
36	Bolts are marked or stamped with “AB36” along with RFL logo or as per customer need.
55	Bolts are marked or stamped with “AB55” along with RFL logo or as per customer need.
105	Bolts are marked or stamped with “AB105” along with RFL logo or as per customer need.