We solve problems.

At RCS, we solve problems and meet needs. That means whether your issues are related to new construction or whether you have issues with a pre-existing structure, RCS offers the solution to meet your needs. Below are some of the most common problems engineers and builders contend with when planning and constructing buildings. Each one of these problems is expertly solved with the RCS TRAC Rail System.




Thermal Movement

Most standing seam roof systems are designed to travel up to 1-1/4” in both directions with thermal expansion and contraction. If the roof is moving, so must the roof curb. “Panel lock down” is the primary cause of most roof leaks.

TRAC Rail Solution
The patented TRAC Rail Curb Support System is pre-centered and shipped assembled to allow for up to 1-1/4” movement in both directions. This is accomplished without any field assembly or adjustments by the erector.




Panel Elevation

Most standing seam roofs are supported by clips that raise the roof panel above the purlin or bar joist, typically 3/8”, 1”, or up to 1-3/8”. To reduce ponding at the front of the roof curb, the roof curb must be elevated to the same plane as the roof panel.

TRAC Rail Solution
The TRAC Rail Curb Support System is factory customized on a per job basis. A simple form is completed with the curb order, which gives us the details we need for custom adjustment.




Full Perimeter Support

Ponding also occurs when there is no cross support at the front and rear curb flange. Without structural cross support at these critical areas, deflection will occur when ever someone stands near the curb to install the roof top equipment.

TRAC Rail Solution
The Trac Rail system is shipped with the two cross channels pre-notched to match the roof curb inside dimension. The structural purlin span channels align with the roof curb. Roof Curb System’s welded Uni-Cricket aids in structural support. With no field notching required, erector labor is reduced.




Negative Pressure

Negative pressure is always a consideration with all roof designs. Negative pressure can affect the integrity of roof penetrations such as skylights, smoke vents, exhaust fans, and other relatively light weight equipment. Roof curbs can be slightly lifted or tilted by negative pressure, which causes the sealant between the curb flange and the roof panel connection to be disturbed. When this seal is broken, opportunity for leaks are greatly increased.

TRAC Rail Solution
The patented TRAC Rail Curb Support System is the only pre-assembled system that allows for full thermal movement while resisting negative pressure.




Mechanical Contractors Supplying and Installing Curbs

Mechanical Contractors should not be asked to supply or install roof curbs for metal roofs. All roof curbs should be supplied by the general contractor or building manufacturer and installed by an experienced erector. As a rule, the mechanical contractor is not familiar with metal roof systems and is not responsible for any leaks. There are many cases where conventional HVAC roof curbs have been installed on metal roofs. This results in a continued maintenance problem for the general contractor.

TRAC Rail Solution
Just fax the HVAC model number to Roof Curb Systems. We have a vast HVAC library and will coordinate the HVAC units with the metal roof system.




A Component Approach To A Systems Industry

A good roof penetration requires more than supplying just a roof curb. Curbs as a component are widely available, but they are just that, “ a component,” not a system.

TRAC Rail Solution
Roof Curb System’s TRAC Rail Roof Penetration System is the only system supplied by a Roof Curb Company designed to address the dynamics associated with standing seam roof systems and consider erector installation. When the erector or installer is on the roof, the last thing he needs to do is stop the job and field notch angles to frame a roof curb, or go look for sealants or fasteners.


Don't Let This Happen to You


Curb Support is Below the Plane of the Roof Panel



Curb Support Doesn't Match The Clip Height



Conventional Curb Used on Metal Roof



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