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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.
F1554 Grades
| F1554 Grade 36 | Low carbon, 36 ksi yield steel anchor bolts |
|---|---|
| F1554 Grade 55 | High strength, low alloy, 55 ksi yield steel anchor bolts |
| F1554 Grade 105 | Alloy, heat treated, high strength 105 ksi yield steel anchor bolts |
Supplementary Testing
Supplementary requirements shall apply only when specified in the purchase order or contract.
S1: Weldable version of the Grade 55 specification. Through chemical composition restrictions and by a carbon equivalency formula, S1 provides assurance of weldability. When S1 is not specified, the Grade 55 material may or may not be weldable.
S2: Permanent manufacturer’s identification on the end of the anchor bolt that projects from the concrete, in lieu of color-coding.
S3: Permanent grade identification on the end of the anchor bolt that projects from the concrete, in lieu of color-coding.
S4: Charpy Impact requirements at +40⁰F (+5⁰C) for grades 55 and 105. The minimum Charpy V-notch energy requirement is an average of 15ft-lbs for three specimens, with no one specimen falling below 12ft-lbs. Charpy Impact requirements at -20⁰F (-29⁰C) for grade 105. The minimum Charpy V-notch energy requirement is an average of 15ft-lbs for three specimens, with no one specimen falling below 12ft-lbs.
F1554 Mechanical Properties
| 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 |
| ||||||
F1554 Chemical Properties
| 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 | ||||
F1554 Recommended Hardware
| Grade | Size Inches | Recommended A563 Nut | Washer | |||
|---|---|---|---|---|---|---|
| Plain Finish | Hot-Dip or Mechanical Zinc Coated | |||||
| Grade | Style | Grade | Style | |||
| 36 | 1⁄2 – 11⁄2 | A | Hex | A | Hex | F436 |
| 15⁄8 – 4 | A | Heavy Hex | A | Heavy Hex | ||
| 55 | 1⁄2 – 11⁄2 | A | Hex | A | Heavy Hex | F436 |
| 15⁄8 – 4 | A | Heavy Hex | A | Heavy Hex | ||
| 105 | 1⁄2 – 11⁄2 | D1 | Heavy Hex | DH2 | Heavy Hex | F436 |
| 15⁄8 – 3 | DH2 | Heavy Hex | DH2 | Heavy Hex | ||
1 A563 grade D nuts are rarely available. A563 grade DH or A194 grade 2H should be substituted. | ||||||
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LADHANI METAL CORPORATION, MUMABAI, INDIA,
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