ASTM 1554 Grades Explained and How To Save Costs

When ASTM 1554 was created in 1994, it was designed to provide a standard specification for structural anchor bolts in concrete foundations. Anchor bolts come in four common types:

- Headed bolts.

- Straight rods fully threaded.

- Straight rods partially threaded on each end (double ended studs)

- Bent anchor bolts (L anchors)

There are three grades under the F1554 specification. The grade number represents the minimum yield strength (ksi) of the material. See Chart below:

- F1554 grade 36: Low Carbon, 36 ksi yield steel anchor bolts.

- F1554 grade 55: High Strength, low alloy, 55 ksi yield anchor bolts.

- F1554 grade 105: Alloy, heat treated, high strength 105 ksi steel anchor bolts.

The threads can be either cut (full body) or rolled (reduced body). Both styles are acceptable and either one can be supplied at the discretion of the manufacturer.

These anchor bolts can be supplied as either plain finish or Hot Dip Galvanized (HDG). If you are using a HDG anchor, then the nuts must be HDG also as they are tapped oversized to allow for coating.

Here are a few tips that will save you time and money when ordering F1554 anchor bolts.

- Consider using fully threaded anchors if possible. Many times, fully threaded material is readily available, whereas partial threaded anchor bolts always need to be special made.

- If you need USA material and / or certifications, remember to specify this up front. Most material is USA but not all of it.

- Not all Grade 55 material is weldable. If you are welding with it be sure to specify that you need weldable material

- A193 Grade B7 is a terrific alternate. If you are having trouble sourcing Grade 55 or Grade 105, consider switching to ASTM 193 B7. This material is extremely common and almost always has much better cost and availability.

- Avoid headed bolts. They are not common and very expensive. Consider using a threaded anchor with a nut welded on the end. If you need more surface area add a large washer or a plate washer.

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