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Structural bolting explainer · 0:50

Standard, Oversized, and Slotted Structural Bolt Holes Explained

Understand standard, oversized, short-slotted, and long-slotted structural bolt holes and why type, size, orientation, joint condition, washers, and inspection matter.

Practical context

Why structural bolt-hole type and orientation are connection information

Structural bolting requirements distinguish standard, oversized, short-slotted, and long-slotted holes because fit, movement, bearing, slip behavior, washers, and installation requirements can differ.

The design documents, project specifications, and governing RCSC and AISC requirements control permitted hole types and their use.

Companion reading and practice

What is missing from a hole description?

A training detail identifies a slot, but its orientation is unclear. Entering only a generic slot type in a model would leave important geometry unresolved.

Locate the governing hole type, dimensions, orientation, and applicable joint requirements in the project documents. Check the specified standards and approval requirements before preparing the detail. A convenient model default or a hole used on another job is not a source for this connection.

Try it with a sample

Prepare a question that names the member, detail, revision, and missing slot direction.

Draft a hole-information question

Examples are fictional learning exercises. This companion text adds context to the video; the transcript below records the narration.

Primary sources

References and further reading

Use the edition and requirements adopted for the project. These references support further reading; a short video does not reproduce the complete standards.

Published by Quantum Steel Design. Sources and editorial approach · Report a correction · Companion guide updated .

Accessible transcript

Standard, oversized, and slotted bolt holes transcript

The visible transcript makes the video content available to people and search systems without requiring playback.

  1. Structural bolt holes can be standard, oversized, short-slotted, or long-slotted, and those labels matter.
  2. A standard hole is the baseline type for the bolt size under the governing requirements.
  3. Oversized and slotted holes add clearance or directed movement, but their permitted use is not automatic.
  4. For a slotted hole, the direction of the slot can change how the connection behaves and must be shown clearly.
  5. Hole type also connects to joint condition, faying surfaces, washers, installation method, and inspection.
  6. AI can flag mismatched notes or geometry, but it cannot authorize a different hole type.
  7. Use the current design documents, project specifications, RCSC requirements, and qualified review.
  8. Learn the complete structural bolting workflow at Quantum Steel Design.

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