In steel frame construction, what is the primary advantage of using bolted connections over welded connections?
Correct Answer
C) Faster installation in the field
Bolted connections can be assembled quickly in the field without special equipment or skilled welders. They also allow for easier disassembly and modification compared to welded connections, though welding may provide higher strength.
Why This Is the Correct Answer
Bolted connections offer significant field installation advantages because they can be quickly assembled using standard tools without requiring specialized welding equipment or certified welders on site. This speed of installation translates to reduced labor costs and faster project completion times. Additionally, bolted connections allow for easier future modifications, repairs, or disassembly if needed, making them highly practical for field construction work.
Why the Other Options Are Wrong
Option A: Better weather resistance
While bolted connections may save on labor costs due to faster installation, the material costs are often higher than welding materials since bolts, nuts, and washers are more expensive per connection than welding consumables.
Option B: Lower material cost
Both bolted and welded connections can be designed for excellent weather resistance when properly protected with coatings, but welded connections may actually have fewer crevices where moisture can collect compared to bolted assemblies.
Option D: Higher strength capacity
Welded connections typically provide higher strength capacity than bolted connections because the weld creates a continuous material connection, whereas bolted connections have stress concentrations around bolt holes that can reduce overall strength.
Memory Technique
Think 'BOLT = Build On-site Lightning-fast Tool-friendly' - bolted connections are all about speed and convenience in field installation.
Reference Hint
Look up structural steel connection methods in the building code commentary or steel construction manual, typically found in structural design chapters covering connection types and their applications.
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