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R & S Manufacturing and Sales Company, Inc.

METAL BUILDING CURBS

STANDING SEAM and HIGH RIB PRE-ENGINEERED ROOFS

Product Features

Insulated Curbs or Non-Insulated Curbs

Extended 20 year warranties available for selected designs

Custom Color Finishes to Match Roof Colors

Sub-framing, Fasteners, Sealants, Covers, and Duct Supports Available

Specifications

curb

Understanding Roof Curbs

Download our free guide

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>>STANDING SEAM ROOF CURBS
*Submittal and Installation Instructions Included in Each Product File
Insulated Curb Non-Insulated Curb Upslope Condition Side Condition Upslope Contours Downslope Contours Top Condition
MB1-SS MB2-SS Over Panel Standard Fixed Fixed Standard
MB3 MB4 Under Panel Standard None None Standard
MB5-SS MB6-SS Under Panel Standard None Fixed Standard
MB7-SS MB8-SS Under Panel Standard Fixed Fixed Standard
MB9-SS MB10-SS Under Panel Standard None None Standard
MB11-SS MB12-SS Under Panel Standard Loose Loose Standard
MB1-SS-RM MB2-SS-RM Over Panel -Ridge Mount Standard N/A Fixed Standard
MB1-SS-IF MB2-SS-IF Over Panel - Internal Flanged Internal Flanged Loose Fixed Standard
MB7-SS-SC MB8-SS-SC Under Panel Seam Clip Fixed Fixed Standard
MB7-SS-SC-AC MB8-SS-SC-AC Under Panel Seam Clip Fixed Fixed Duct Supports
MB2-SS-RM-CT Over Panel - Ridge Mount Standard N/A Yes - Fixed Collar Top
MB8-SS-SC-CT Under Panel Seam Clip Fixed Fixed Collar Top
MB3-7-FC Under Panel Standard Fixed Fixed Floating Curb - Inner, Outer & Counterflashing

 

>>HIGH RIB ROOF CURBS
*Submittal and Installation Instructions Included in Each Product File
Insulated Curb Non-Insulated Curb Upslope Condition Side Condition Upslope Contours Downslope Contours Top Condition
MB1-HR MB2-HR Over Panel Standard Fixed Fixed Standard
MB5-HR MB6-HR Under Panel Standard None Fixed Standard
MB7-HR MB8-HR Under Panel Standard Fixed Fixed Standard
MB9-HR MB10-HR Under Panel Standard None None Standard
MB11-HR MB12-HR Under Panel Standard Loose Loose Standard
MB1-HR-RM MB2-HR-RM Over Panel - Ridge Mount Standard N/A Fixed Standard
MB1-HR-IF MB2-HR-IF Over Panel - Internal Flanged Internal Flanged Loose Fixed Standard
MB1-HR-LO MB2-HR-LO Over Panel Lay-Over Fixed Fixed Standard
MB1-HR-LO-KS Over Panel Lay-Over Fixed Fixed Standard
MB7-HR-LO MB8-HR-LO Under Panel Lay-Over Fixed Fixed Standard
MB7-HR-AC MB8-HR-AC Under Panel Standard Fixed Fixed Duct Supports
MB7-HR-LO-AC MB8-HR-LO-AC Under Panel Lay-Over Fixed Fixed Duct Supports
MB2-HR-RM-CT Over Panel - Ridge Mount Standard N/A Fixed Collar Top
MB7-HR-CT MB8-HR-CT Under Panel Standard Fixed Fixed Collar Top
MB8-HR-LO-CT Under Panel Lay-Over Fixed Fixed Collar Top
MB9-HR-CT Under Panel Standard No No Collar Top
MB9-HR-RM-CT Over Panel - Ridge Mount Standard N/A No Collar Top

 

 

 

 

 

 

 

MB1 & 2 Over/Over - Installs over the roof sheeting on the upslope, downslope, and sides. May be more susceptable to upslope leaks.

 

 

 

Metal Building Curbs - Model Number Directory

 

MB3 & 4 Under/Over - Installs under the roof sheeting on the upslope,and over the sheeting on the downslope, and sides. May be used on batten style roofs with downslope slotting by others.
MB5 & 6 Under/Over - Installs under the roof sheeting on the upslope,and over the sheeting on the downslope, and sides. This curb requires closures on the upslope.
MB7 & 8 Under/Over - Installs under the roof sheeting on the upslope,and over the sheeting on the downslope, and sides.
MB9 & 10 Under/Over - Installs under the roof sheeting on the upslope,and over the sheeting on the downslope, and sides. Offset downslope and flat upslope flanges require closures.
MB11 & 12 Under/Over - Installs under the roof sheeting on the upslope,and over the sheeting on the downslope, and sides. Loose contours provide for special placement.
MB1-RM & MB2-RM Over/Over - Installs over the roof sheeting on a ridge condition. Double pitched.
MB1-LO & MB2-LO Over/Over - Installs over the roof sheeting on the upslope, downslope, and sides.Lays over one seam beyond each curb wall. Upslope inboard contours fit over sheeting.
MB7-LO & MB8-LO Under/Over - Installs under the roof sheeting on the upslope, over the sheeting on the downslope, and sides. Lays over one seam beyond each curb wall. Upslope inboard contours fit under sheeting.
MB1-IF & MB2-IF Over/Over -Loose upslope front sub-frame fits under sheeting. Loose upslope cricket and curb fit over the sheeting. Designed for internal fastening.
MB7-SC & MB8-SC Under/Over - Installs under the roof sheeting on the upslope, and over the sheeting on the downslope. The sides each butt against a seam and are covered with a seam clip. Upslope inboard contours fit under sheeting.
MB7-AC-LO & MB8-AC-LO Under/Over - Installs under the roof sheeting on the upslope,and over the sheeting on the downslope, and sides. Top fitted with condensate covers, and/or duct supports for air conditioners or make up air units.
MB7 & 8 Under/Over - Installs under the roof sheeting on the upslope,and over the sheeting on the downslope, and sides. Top with a round 3" high collar to flash a round duct penetration.
MB3-MB7-FC Floating curb system. Inner structural curb to support heavy equipment. Outer metal building curb and counterflashing goes outside the inner curb. The outer curb is for sealing the opening from weather and floats with the standing seam roof.