Commercial Rooftop HVAC Dunnage
Custom structural steel dunnage fabricated from project plans, equipment data, loading criteria, and support-point information.
Buying Commercial Rooftop HVAC Dunnage
Use this scope when rooftop mechanical equipment needs a project-specific steel load path above the roof assembly. Pricing is developed from the actual unit data, roof framing, support elevations, and connection requirements—not from a standard per-unit price.
Equipment Supported
- Packaged rooftop units
- Air handlers and dedicated outdoor-air systems
- Make-up air units
- Other commercial mechanical equipment with documented support reactions
What information is needed for pricing?
To evaluate a project-specific quote request, provide:
- Manufacturer cut sheets showing operating weight, dimensions, center of gravity, and support or curb points
- Structural roof plan, equipment plan, dunnage details, roof slope, and required bottom-of-steel elevation
- Project location, requested-on-site date, and current drawing set
- Required support elevations, clearances, connection details, and design criteria from the responsible project team
- Finish specification and any inspection, documentation, packaging, or shipping requirements
Engineering Disclaimer
Final design, anchorage, loading, wind, seismic, roof, and installation requirements may require review by the project engineer, licensed design professional, equipment manufacturer, or other qualified party. Pricing is subject to confirmation of dimensions, loads, site conditions, finish requirements, delivery requirements, and final scope.
Fabrication and Finishes
Hot-dip galvanizing is commonly considered for exposed rooftop steel; shop primer, bare steel, or a project-specified coating can also be reviewed. The accepted quote must define surface preparation, coating system, color, touch-up, and who coordinates vent and drain details for galvanizing.
What Drives Cost?
There is no reliable standard price without project information. The principal pricing variables for this scope are:
- Steel tonnage and frame height
- Number of equipment support points and required cross-framing
- Connection complexity and existing-building constraints
- Galvanizing or specified coating
- Piece size, shipment splits, and site schedule
Delivery Considerations
Provide site access, crane pick limits, receiving hours, unloading responsibility, and preferred shipment sequence. Large assemblies may need to ship in sections; freight, permits, escorts, and jobsite assembly are confirmed in the written scope.
Scope Exclusions to Confirm
These items are excluded unless the accepted quote expressly includes them:
- Mechanical equipment, curbs, vibration isolators, piping, ductwork, and electrical work unless listed
- Professional design, sealed calculations, and engineer-of-record approval unless expressly included
- Roofing, waterproofing, penetrations, flashing, restoration, and roof curbs unless expressly included
- Field measurement, demolition, crane service, unloading, erection, and field welding unless expressly included
Frequently Asked Questions
Can rooftop dunnage be priced before the RTU is released?
A budget review may be possible with preliminary weights and dimensions, but release for fabrication requires coordinated equipment data and approved project information.
Does the frame include roof attachments?
Only when the accepted scope and drawings identify them. The responsible design team must establish attachment and load-path requirements.
Are finish, freight, and installation included?
Not automatically. The accepted quote must state the finish, freight terms, unloading, installation, and every other included responsibility.
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Ready for Pricing?
Submit your equipment details and any available plans. Our team will review your requirements and provide a detailed quote.
Request a QuoteCommercial Grade
Fabricated for real-world contractor demands.
Project-Specific Review
Scope and requirements are reviewed before fabrication.
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Coordinated delivery to your job site.