Flat-Flange Curb System
Flat-Flange curbs offer great flexibility for new and retro-fit applications. For roofs with panels out of modulation*, loose rib caps and plugs can offer a good option. RCS will not recommend rubber, polypropylene-based, or ABS plastic rib covers as the fasteners can too easily cut into the cap base. We exclusively offer aluminum rib caps & plugs designed for specific roof panel types with custom developed dies to ensure long-term weather-tightness** and durability.
Flat-Flange curbs are available with loose High-Rib Caps and Plugs standard with optional integrated/welded High-Rib Caps and Plugs available at request.
RCS offers a specific TRAC Rail™ sub-framing for Flat Flange curbs to ensure critical curb/panel connections are properly supported while maintaining the dynamics of metal buildings. The appropriate TRAC Rail™ product will be provided depending on your Panel Elevation or Roof Clip height.
The Flat-Flange Roof Curb Package includes the following for a complete installation:
TRAC Rail™ for Flat-Flange Curb
Flat-Flange Curb fabricated to coordinate with the building roof slope and specific rooftop equipment
Mastic and Tube Sealant
Fasteners
Closures
Roof Curb Specifications:
Material: .063 or .080 Aluminum; 18-Gauge AZ55 available upon request
Insulation: 1-1/2” Commercial Board Fiberglass with R-6.5 thermal rating
CNC Punching and Burning fabrication processes deliver the most accurate nested metal parts
Configurator driven fabrication optimizes Forming processes to reduce welds and increase curb strength
Digital Wave Pulse welding technology delivers superior and consistent penetrating welds when combining Aluminum parts
All curbs are available in custom color paint to match your painted roof if desired
*When using curbs with welded rib caps and plugs special attention must be given to roof curb sub-framing location. If the roof panels are not in perfect modulation, welded on rib caps and plugs may not be the best choice.
**RCS will not offer an over/over installation due to elementary building science principles that have consistently proven the premature and rapid deterioration of the perpendicular up slope panel/curb connection due to exposure to ice and water.