AISC Anchor Rods.
Recommended hole diameter and washer size for an anchor rod in a base plate.
AISC Table 14-2, recommended sizes for washers and anchor rod holes in base plates. The 1", 1-1/4", 1-1/2" and 1-3/4" rows differ between editions.
How to use it
- Choose the AISC edition.
- Pick the anchor rod diameter, from 3/4" to 2-1/2".
- Read the recommended hole diameter, washer size and minimum washer thickness.
Example
A 1" rod in the 15th Edition: hole 1-7/8", washer 3", minimum washer thickness 3/8". In the 14th Edition the hole is 1-13/16".
Source and notes
- Source: AISC Table 14-2, recommended sizes for washers and anchor rod holes in base plates.
- The 1", 1-1/4", 1-1/2" and 1-3/4" rows differ between editions. The 3/4", 7/8", 2" and 2-1/2" rows are the same.
- The AISC tables belong to the American Institute of Steel Construction. They are shown here as a quick reference and may not match the edition or addenda you are required to use.
More tools
AISC Bolt Reference
Hole and slot sizes, minimum bolt spacing and minimum edge distance by bolt diameter.
Open tool →AISC Angle Gage
Workable gages g and g1 to g4 for an angle leg size.
Open tool →AISC Fillet Encroachment
Encroachment allowance when riding the fillet, by k_det − t_f.
Open tool →DisclaimerEducational use only. Not engineering, legal or code-compliance advice.
The content on StructuralWorld, including articles, diagrams, calculators and other tools, is provided for general educational and informational purposes only. It is not engineering, architectural, legal or code-compliance advice, and it does not create a professional relationship between you and StructuralWorld or its authors.
Codes, standards and regulations (for example OSHA, IBC, ADA and AISC) are revised regularly and are adopted and amended differently by each jurisdiction. Figures shown here may be simplified, may refer to a specific edition, and may be out of date or contain errors. Calculators and interactive diagrams are illustrative only and are not a substitute for design calculations, shop drawings or engineering review.
Before relying on any information for design, fabrication, erection, inspection or safety decisions, verify it against the current governing code and the project documents, and consult a qualified, licensed professional (such as a structural engineer) and the authority having jurisdiction.
To the fullest extent permitted by law, StructuralWorld and its authors make no warranties, express or implied, about the accuracy, completeness or fitness for a particular purpose of this content, and accept no liability for any loss, damage or injury arising from its use or from reliance on it. Links to third-party standards and websites are provided for convenience; that material belongs to its owners. If you find an error, please let us know.