Rtu curb detail directly below the flanges of the curb to give further support, and to minimize vibration. • Curb dimensions and material vary depending on unit size and options. See 3. The curb can also be mounted on a roof deck. • Setting the C-RTU on the roof curb for completion of the condensate line connection in the RTU. The R&S Standing Seam Roof Curb fits any trapezoidal or vertical standing seam roof panel. Roof Curb Assembly 1. A critical element of roof curb systems is their ability to repel water effectively. Refer to detail. Region. Equipment curbs have a level top for proper RTU operation. Curb installation should be a part of the roof deck, not on top of insulation or roofing materials. #4 44 5/ 16 " 16" 16" 28 3/ 4 " 0" 0" 0" Roof opening for supply duct Roof opening for return duct Outline of GPFV vented roof curb for flat roofs for kitchen applications. The Reliable Rooftop Package Curb with durable 18ga. Using screws provided, attach the corners by allowing the angle of the 4. a piece of tape mastic beneath the 90° bend (see detail "b"). 728. Cross bracing is provided as needed NOTES: 1. Unit Tonnage Description Part Number Curb 14" Tall 0221L00014 Curb 24" Tall 0221L00015 Curb 14" Tall 0270L01153 Curb 24" Tall 0270L01154 7. This is especially vital in flat roof curb detail curb to give further support, and to minimize vibration. Install (3) deck pans and support deck on compressor For R-Panel applications, we use the same design techniques as curbs for standing seam roofs; whereas, the up slope/down slope highs fit the same as our standing seam curb. Set the 4 perimeter pieces, (2 end rails and 2 side rails), together to form the curb. 8855 unit before the unit is placed on the curb. (Based on MFAB's experience, this is the standard for 90% of RTU Curbs. apply a bead of butyl tube caulk in the exposed end of panel seam (see detail "c"). The following are typical curb styles used with rooftop units. The curb must be leveled to ensure proper flow of condensate from the unit. Investing in a high-quality curb is essential for functionality and longevity of the HVAC system. 11. Bring together the curb side assembly and the curb end. Each roof curb is meticulously crafted to provide a seamless interface with the roof, to help ensure that structural integrity is maintained. #4). Curb Installation 1. Refer to the factory roof curb drawing provided with the unit for specific curb in-formation. 5. place tape mastic around vertical rib on top of curb flange as dimensions show above (see detail "c"). And in this one sentence lie the benefits and the detriments we face in the roof curb business everyday. Pressure-treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer. 4. Pre-assemble the curb as shown in Figure 3 and Figure 4. This will avoid the need for any heat tape and insulation on the drain line Dec 1, 2022 · Double roof curb with flashing collar. Here again, the curb base sides extend to the next natural seam and mates to the roof panel by lapping over the rib, making the curb an integral part of the roof system. Curb flashing detail for TPO roofing systems. Curb is fully formed on three sides with a single, fully U-5A Curb Flashing TPO. 5 3 to 6 Knocked Down Roof Curbs Fastcurbs offers custom roof curbs, metal building roof curbs, rooftop equipment RTU curb, equipment rails, skylight curbs and custom rooftop unit adapters. Curb, curb rest, nailer, and gasket curb should be placed directly on the roof support members. Standard curbs are used for mounting many exhaust/supply fans and those units weighing less than 1000 lbs. 3278 Home Jan 4, 2024 · RTU curbs are quoted spanning a single Bar Joist. In this case, additional nailing plates must be provided directly below the flanges of the curb to give further support, and to minimize vibration. If lifting curb after it has been assembled, hammer all corner tabs over to side. #3 Roofing Detail ILL. This will ensure the duct openings in the curb and unit are properly aligned. detail j-j (curb fully supported by deck rib) detail k-k (curb over deck valley) detail k-k (curb fully supported by deck rib) hss5x2 1/2x1/4 continuous between existing joists for full length of rtu curb metal roof deck - supporting joist not shown for clarity reference the mechanical drawings for rtu and curb information continuous 8"x18ga. 469. It helps in maintaining proper airflow and stability for the unit. The (4) optional retainer brackets are installed in each corner of the base. See Figure 5 and Figure 6. 877. A complete line of roof curb products for mounting Greenheck rooftop equipment. Curb is designed to provide the required 40 inch (1016 mm) minimum discharge height above the roof line per NFPA 96. Bring together a curb long side and a curb short side. Curb Adapters RTU Curb Adapters Curb Adapter 1Old RTU Information2New RTU Information3Contact Information Old RTU Manufacturer Specifications. CURB-MOUNTED INSTALLATION Install curb Install field-fabricated ductwork inside curb Install accessory thru-base service connection package (affects curb and unit) (refer to accessory installation instructions for details) Dec 13, 2019 · Before installing roof curbs, there are many details to consider. As a genera l rule, the curb should be placed directly on the roof support members. Vents allow hot air and gases to escape between the ductwork and roof curb. Flat Curbs See Figure 2. Curbco strives to provide useful information about installing HVAC RTUs (roof-top units). Prefabricated roof curb to be manufactured of prime galvanized steel construction, 20 , 18, 16 or 14 gauge as required, meeting ASTM A653/653M, with welded corners and with seams joined by continuous water and air tight welds. ) Repeat for opposite side. 5 days ago · The height of a rooftop unit curb should typically be around 14 inches to provide adequate support for HVAC equipment. Let's Discuss Your Requirements. (Photo courtesy of Design Components) “Roof curbs are becoming more prevalent on metal roofs due to the popularity of metal building systems in more complex applications, along with code-driven initiatives focused on daylighting, rooftop unit (RTU) efficiency, and ventilation in the promotion of energy conservation and occupancy health,” says Clifton the roof curb will be mounted on a new building, it can be assembled at any convenient location and installed as soon as the roof support members are in place. It is important to know the pitch of the roof as well as the style and manufacturer of the roof panel. Attach the corner bracket to the Specifications. See Figure 3 and Figure 4. G90 steel, duct support channels, and customizable insulation for superior roofing performance. ) the roof curb will be mounted on a new building, it can be assembled at any convenient location and installed as soon as the roof support members are in place. Set the curb in the proper position around the roof opening. On the CRRFCURB003, 004 curbs: Install the unit locator panel on the condenser end of the curb. Several models are available to ensure the perfect fit for each roof whether its flat, pitched, or ridged (double pitch). Curb size and design meet any skylight or rooftop equipment requirements. English. • Bringing the drain line directly into a conditioned space below the RTU, if possible. Roof curbs are to be installed on the roof decking before setting of the Commerical Rooftop unit. Curb Adapter Strategies – Aligning The Supply & Return. Aug 1, 2019 · Complete resource on RTU curbs and curb adapters. The primary function of the curb is to keep weather out while supporting/flashing the equipment on it. Prefabricated Vibration isolation curb to be manufactured of prime galvanized steel construction, 18 or 14 gauge as required, meeting ASTM A653/653M, with welded corners and with seams joined by continuous water and air tight welds. If the curbs need to span more than one bar joist, MFAB must be informed before providing a quote. passage opening inside the roof curb, so it can connect to the C-RTU drain port. 2. Screw in place. Nov 5, 2015 · Curb Adapters are designed to properly seat a new (RTU), then redirect the new supply & return openings to match the duct work fastened to the existing curb. Use tack welding or other suitable fastening method to secure the roof curb in place. Assemble the perimeter frame of the roof curb. next perform a 360° crimp (as shown in detail c), for at least 6" beyond the end of the panel seam. Optional. Review the following for recommended sequences for installation steps. Different panels can have different profile styles and rib height requirements. What Is An Rtu Curb? An RTU curb is a frame on a building’s . Break the bands and remove the wood holding the curb assembly together. Curbs should be a minimum of eight inches above the finished roof and factory-insulated to reduce condensation. Roof Opening Detail ILL. Seam-to-seam (R&S Seam Clip) side flanges come standard for a complete weather-tight seal. 5 to 12. Unless otherwise specified in the contract drawings by the Engineer, MFAB quotes RTU curbs using 4x4x1/4" angle iron. 1. Attach the two corner brackets to the curb long side and the curb short side using the hardware provided. The Significance of Roof Curb Detail. English Preview; Download English PDF; Download English DWG; Mar 7, 2007 · Prefabricated roof curbs have been in use since the roof has been utilized for something other than keeping weather out. Ensures Watertight Integration. Curb products safely support rooftop equipment while maintaining a leak-proof interface between the building and HVAC equipment. (See Fig. 3. curb by screwing through the base and into the curb (ILL. Nearly every HVAC manufacturer uses different roof curb layouts specific to their HVAC rooftop units. Refer to unit locator detail. Whether you’re an experienced contractor or distributor, just starting your career, or just an inquiring member of the general public, you’ve arrived at the only page you need to learn all there is to know about roof curbs and curb adapters. Refer to the figures in this manual for specific details for your curb. Our friendly Specialists are ready to help you order HVAC Roof Curbs! 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