Beams and Columns
Diagonal Bracing
Solid web structural members used as diagonal bracing must be secured by:
- at least one bolt per connection drawn up wrench-tight
- the equivalent, as specified by the project structural engineer of record
This is a good example of diagonal bracing
Double Connections at Columns
When two structural members on opposite sides of a column web, or a beam web over a column, are connected sharing common connection holes:
- At least one bolt with its wrench-tight nut must remain connected to the first member, or
- A shop-attached, or field-attached seat or equivalent connection device is supplied with the member in order to secure the first member and to prevent the column from being displaced. (See Appendix H of the OSHA Standard for examples of equivalent connection devices.)
If a seat or equivalent device is used:
- The seat (or device) must be designed to support the load during the double connection process.
- Before the nuts on the shared bolts are removed to make the double connection, it must be adequately bolted or welded to both:
- a supporting member
- the first member
Knowledge Check Choose the best answer for the question.
3-10. Solid web structural members used as diagonal bracing must be secured by _____.
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