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Quick answer
Quick answer: anchor bolts for steel columns
ASTM F1554-20 provides Grade 36, Grade 55 and Grade 105 anchor-bolt grades; common project details show sizes such as 3/4 in × 12 in and 2 in × 18 in, but those are examples rather than universal design values. Final dimensions must be determined by the structural engineer.
| Published detail example | Grade | Diameter | Embedment | Use in an RFQ | Inquiry |
|---|---|---|---|---|---|
| C1/C2 column schedule | F1554 Grade 36 | 3/4 in | 12 in | Example only | Quote this size |
| C3–C6 column schedule | F1554 Grade 105 | 2 in | 18 in | Example only | Quote this size |
Sourcing these sizes? Anchor bolts Custom fasteners to drawing
ASTM F1554 grades for column anchors
ASTM F1554 is the anchor-bolt specification. Grade 36 is the general weldable grade; Grade 55 requires Supplement S1 when weldability is needed; Grade 105 is heat-treated and should not be welded. Confirm the current ASTM edition and the project specification.
| Grade | Yield strength designation | Field identification | Welding note | Inquiry |
|---|---|---|---|---|
| Grade 36 | 36 ksi | Blue | Weldable under the specification | Quote this size |
| Grade 55 | 55 ksi | Yellow | Weldable only when Supplement S1 is ordered | Quote this size |
| Grade 105 | 105 ksi | Red | Do not weld; heat-treated grade | Quote this size |
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Common diameter and embedment examples
The two rows below are published project-detail examples under ASTM F1554, not design recommendations. Embedment depends on concrete strength, edge distance, spacing, reinforcement, tension, shear and the governing ACI/AISC design method. Use the example only to make an RFQ legible; do not copy it into a drawing without engineering approval.
| Example | Grade | Diameter | Embedment | Status | Inquiry |
|---|---|---|---|---|---|
| C1/C2 column schedule | F1554 Grade 36 | 3/4 in | 12 in | Example only | Quote this size |
| C3–C6 column schedule | F1554 Grade 105 | 2 in | 18 in | Example only | Quote this size |
Need these ASTM F1554-20 / AISC Design Guide 1 sizes? Request a quote
Base-plate holes, plate washers and anchor types
AISC recommends sizing base-plate holes and the washer together because the hole is intentionally oversized for setting tolerance. The plate washer must bridge the hole and transfer tension into the base plate; its size and thickness are design inputs, not a generic flat-washer substitution. L and J bolts use bent hooks, double-ended rods allow top-and-bottom nut or plate details, and headed or plate-anchored bolts develop bearing through a head or anchor plate. The final dimensions must be determined by the structural engineer.
| Anchor form | Typical selection question | RFQ note | Inquiry |
|---|---|---|---|
| L type | Is hook anchorage acceptable for the load path? | State hook length and bend detail | Quote this size |
| J type | Does the hook geometry fit reinforcement and edge distance? | State hook radius and orientation | Quote this size |
| Double-ended | Are top and bottom threads needed for setting or leveling? | State thread lengths and nut arrangement | Quote this size |
| Headed / anchor plate | Is predictable bearing or uplift transfer required? | State head or plate size, weld and inspection requirement | Quote this size |
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Order these sizes from HEXVARO
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Frequently asked questions
What F1554 grade is commonly used for a steel column anchor bolt?
Grade 36 is the general weldable option, while Grade 55 and Grade 105 are selected when the design requires their higher yield strengths. The structural engineer must choose the grade for the connection.
How deep should a steel-column anchor bolt be embedded?
There is no universal embedment depth. It depends on the concrete, reinforcement, edge distance, spacing and applied tension or shear; final dimensions must be determined by the structural engineer.
What is the relationship between a base-plate hole and washer plate?
The base-plate hole is often oversized for setting tolerance, so a heavy plate washer must be large and thick enough to bridge the hole and transfer the design force into the plate. AISC Design Guide 1 and the project engineer control the final dimensions.
Are L-bolts and J-bolts interchangeable with headed anchors?
No. L and J bolts rely on bent-hook anchorage, while headed or plate-anchored bolts rely on bearing. They are different anchorage details and must not be substituted without engineering approval.
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