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What Is A HVAC Equipment Support & How Does It Work?

Have a need for structural rooftop support and don’t want the hassle of roof penetration? You’re in luck, they’re called equipment supports.

What Is An Equipment Support?

Standard Equipment Support

These load-bearing supports are typically used to elevate and/or load support rooftop piping, ductwork, HVAC equipment, RTU’s (Rooftop Units), walkways, and more. Customizable in height & length to match your specific requirements, easy to transport, and can be carried onto any roof without major hassle. Referred to as Equipment Supports, Equipment Rails, Support Rails & Sleeper Curbs. Equipment Supports are constructed of galvanized steel with continuous welded and mitered corner seams. They contain a wood nailer shrouded under a galvanized metal cover, allowing you to nail/secure roofing material directly to it.

Not All Equipment Supports are Created Equal

MicroMetl Equipment Supports offers a linear weight distribution. The advantage of linear support is the distribution of weight. The entire base of the support is evenly distributed onto the rooftop. Some manufacturers offer a metal frame with two metal legs to be set upon the roof. A smaller point of pressure does not distribute the load evenly across a wider surface area and could cause the load to sink into or through the roof. Similar to the weight distribution of a 100-pound woman wearing high heel shoes. A stiletto heel with an area of approximately 1/10 of a square inch could produce a static loading around 1000 pounds per square inch!


Power Exhaust Modules… After-market Power Exhaust modules are often attached to a RTU using only screws. Over time the weight and operation of the power exhaust may cause separation from the RTU resulting in internal water & air leakage or complete separation, therefore, reducing the efficiency of the HVAC unit and/or Power Exhaust. An Equipment Support placed under a power exhaust module will redistribute the weight by redirecting the stress of torque & load.

An RTU Which Extends Over A Roof Curb…  An Equipment Support often functions as additional support for your RTU after it is placed on the Roof Curb. Does your unit cantilevers over the curb, the manufacturer of the RTU may require one or more Equipment Supports. This is often the case on very large tonnage units ranging from 25 ton to 100 ton and larger.

I’m Replacing An RTU, I Will Have An Existing Support Under The RTU, Can I Reuse It?

The answer is not a simple yes or no. Most existing supports in the field are several inches smaller in height than the roof curb and extend beyond the width of the curb. They are designed to fit under the base rails. Speaking specifically about a MicroMetl Curb Adapter, we offer adjustable equipment supports supplied with 1/2 neoprene base pads designed to lay directly upon the rooftop — no roofing material attachment required! In the case where the existing equipment support can be utilized, an engineered support is strategically placed on the base of the curb adapter.

Don’t Substitute Quality

Don’t Substitute an Equipment Support with anything which simply supports weight! An example is “Dunnage,” Railroad Ties are often placed on a roof to support just about everything imaginable. Unlike galvanized metal support, they are susceptible to rot, ants, termites, and the like, and should not be used.

Standard Or Canted?

Standard Equipment Support

Canted Equipment SupportSupport.

MicroMetl Offer Two Styles of Equipment Supports – Straight/Standard Supports & Canted Supports. Each Offering 200 Lbs. Per Linear Foot of Load Support.





The HVAC Industries First Curb Adapter Phone App! Quote It Now… Get It Now!

MicroMetl is the first and only in the HVAC industry to produce an exclusive Android/iPhone Curb Adapter App. No longer do you have to imagine the easy of searching for a replacement curb while on a roof! MIcroMetl is working hard to reduce your effort while improving your productivity!

Download Your App Now!


Additionally, MicroMetl now offers its valued customers the ability to add Curb Adapters directly to a cart and order online!

Learn More About https://CurbAdapter.Expert

Order On-Line… check out the videos below or contact MicroMetl’s Customer Care & Service Department...

HVAC – What Is An Adjustable Pitch Curb?

HVAC What Is An Adjustable Pitch Curb At MicroMetl

Abbie-Stancato-At-MicroMetl-Corporation-HeadshotHave you ever notice a rooftop which was not flat, but angled? Of course, we all have. Now imagine you must install a HVAC Rooftop Unit (RTU) on to the roof.

Perhaps you’re thinking, so what if the RTU is angled on the roof. Valid statement. Valid, but problematic… for starters HVAC rooftop units are designed to externally drain internal condensation, depending upon the angle, this could cause the condensation to collect and leak into the building, or cause rust issues by collecting on internal components.

The primary factor is weight distribution. A Roof Curb is designed for the weight of a RTU to be distributed directly downward. If you set a flat curb on an angled roof you are redistributing the weight disproportionately throughout the roof curb, and altering the RTU’s center of gravity. This could cause the roof curb to physically fail, and the RTU to fall off the rooftop; especially in storm and wind conditions which would pose little to no danger to a well seated, flat lying curb.

A Fixed Pitch Curb

Often when choosing a pitched curb, a specific fixed angle “Welded Pitch Curb” must be custom ordered. The pitch angle of the roof must be measured, and the exact placement and orientation of your RTU’s supply & return must be considered.


The Adjustable Pitch Curb is designed to pitch in any direction, and ships knockdown. It is less expensive than a fixed welded pitch curb, and offers job-site flexibility. All MicroMetl Adjustable Pitch Curbs are designed to pitch up to 1 in 12 inches in any direction. Adjustable Pitch Curb In Motion At MicroMetlMeaning they will set level on a roof which the roof pitch increases, or decreases 1 inch in height, for every 12 inches of roof extension or run.

The Adjustable Pitch Curb allows an installer to inventory less curbs, allows job site flexibility, and reduces wait time from manufacturing, while offering peace of mind knowing the incorrect “Welded Pitch Curb.” won’t be mistakenly ordered.

Adjustable Height – The Added Bonus

Most manufacturers construct a standard height 14 inch tall curb. Other standards (speaking specifically of MicroMetl), often consist of an 8, 11, 14, and 24 inch fixed height curb. Adjustable Height Curb In Motion At MicroMetlTherefore, if you desire a height outside of the standard, you will experience a slight premium for breaking the standard. The Adjustable Pitch Curb can save you the additional cost by acting as an Adjustable Height Curb.

Therefore, the same curb you could inventory for a pitched roof can save you money by allowing height requirement flexibility. Because the curbs are designed for a maximum of 1 in 12 inch pitch, the height adjustment will vary from curb to curb. Please feel free to contact the MicroMetl Customer Service Department to verify height requirements, or post your questions on our Open Forum!

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