NASCLA Accredited Commercial General ContractorMetalsMedium
A contractor is planning the erection of a multi-story steel framed building. To ensure the stability of the structure during the initial stages of erection and before all permanent connections are made, which of the following temporary measures is most crucial?
- APainting exposed steel surfaces to prevent corrosion.
- BWelding all beam-to-column connections immediately.
- CInstalling temporary guy wires and bracing.
- DApplying fire-resistive coatings to columns.
Show answer & explanationAnswer & explanation
Correct answer: C. Installing temporary guy wires and bracing.
Temporary guy wires and bracing are essential for maintaining the stability of a steel structure during erection, preventing collapse due to wind, seismic forces, or construction loads before the permanent connections can provide full rigidity. Fireproofing, welding, and painting are later or permanent steps.
Why the other options are wrong
- A. Painting steel for corrosion protection is a finishing step, not a primary measure for erection stability.
- B. While welding forms permanent connections, it's not the initial stabilization method; temporary bracing is needed before all welds can be completed.
- D. Applying fire-resistive coatings is a post-erection activity for fire protection, not for erection stability.
Erection Stability
The practice of ensuring a steel structure remains stable and safe from collapse during the construction phase, typically through temporary bracing and careful sequencing.
- Critical for preventing progressive collapse during construction.
- Includes temporary guy wires, shores, and bracing.
- Must account for construction loads, wind, and seismic forces.
Memory trick: Erect Safely: Plan, Brace, Connect, Inspect.