Contact Us: 800-387-5335
The Long Bay® System is a secondary framing solution designed for wide-span steel buildings that require large, unobstructed interior spaces. It provides column-free bay spacing of 40 to 60 feet, allowing greater flexibility in building layout, faster installation, and reduced construction labor compared to traditional bar joist systems.
• Wide-span bay spacing from 40′ to 60′
• Open web truss framing for roof support and system integration
• Bolted purlin connections instead of welded bar joists
• Reduced horizontal bridging requirements
• Factory-engineered components for precise fit and alignment
The Long Bay® System is engineered to reduce installation time and labor costs.
• Purlins bolt directly to the rafter rather than being welded
• Horizontal bridging is attached using self-drilling screws
• Components can be assembled on the ground and lifted in sections
• Less welding improves jobsite safety and construction speed
These features result in faster erection, fewer labor hours, and improved schedule control.
The Long Bay® System is compatible with a wide range of building materials and configurations.
Wall Systems
• Tilt-wall or pre-cast concrete
• EIFS and curtain wall assemblies
• Masonry and brick
• Insulated or single-skin metal wall panels
Roof Systems
• Robertson standing seam roof systems
• B-deck for built-up or single-ply roofing
The system can be designed with tapered or straight interior columns, and sidewall columns may not be required for buildings with fully load-bearing walls.
The Long Bay® System is commonly used in buildings that require large, open interior spaces, including:
• Manufacturing facilities
• Distribution and warehouse buildings
• Large retail structures
Manufacturing Precision
All Long Bay® System components are designed, punched, drilled, and fabricated in a controlled manufacturing environment. This ensures consistent quality, accurate fit, and reduced field modifications during erection.
What bay widths does the Long Bay® System support?
The system is available in bay widths ranging from 40 feet to 60 feet, depending on project requirements.
How does the Long Bay® System compare to traditional bar joists?
Unlike traditional bar joists, Long Bay® purlins are bolted rather than welded, require less horizontal bridging, and allow for faster, safer installation.
What types of buildings use the Long Bay® System?
The system is ideal for manufacturing, distribution, and large retail buildings that benefit from wide, unobstructed floor plans.
Robertson Building Systems provides single-source design, fabrication, and schedule control to support efficient steel building construction from start to finish.
