Metal Building Curbs (MB)

Metal Building Curbs (MB)

Altra Custom Manufacturing Inc. metal building curbs are designed to provide a precise, weather-tight solution for mounting rooftop equipment on ribbed and standing seam metal roofs. These curbs are tailored to match roof profiles and slopes, ensuring a secure fit and optimal performance.

Manufactured from heavy-gauge galvalume steel, they offer exceptional durability and resistance to harsh environmental conditions. Welded seams and integrated sealing components prevent water infiltration, while insulation improves energy efficiency.

Additional options such as diverters, rib caps, and support channels enhance functionality and adaptability. With both standard and custom configurations available, these curbs provide a dependable solution for metal roofing systems.

 

Pate manufactures metal building curbs to match any ribbed or standing seam roof panel. MB curbs are manufactured to conform to roof slope, and are sized correctly for rooftop mounted equipment.

  • Durable, heavy-gauge galvalume construction
  • Seams are welded water-tight and treated with rust inhibitor
  • Rigid fiberglass insulation
  • Designed for specific roof panel and pitch
  • Closed-cell foam gasket for top flange
  • Butyl tape provided for sealing curb to roof panel
Product Group Description
PC-2MB-1 Straight-sided metal building curb, one-piece design, welded ribs
PC-2MB-3 Straight-sided metal building curb, one-piece design, flat flanges, optional loose ribs
Options:
     
  • Diverter or cricket to channel water and snow around curb
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  • Skylights, smoke vents and roof hatches
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  • Rib Caps (optional) to match roof panel
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  • Rib Caps – if used can be welded/loose
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  • Recommend loose ribs
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  • RTU – includes duct supports and insulated pans
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  • Support channels – fabricated to span 2 or 3 purlins to support curb