Question 1

What is rooftop HVAC dunnage?

Accepted Answer

Rooftop HVAC dunnage is a custom-fabricated structural steel support frame used to transfer mechanical-equipment loads to designated support points. Final load paths, attachment, and roof requirements require project-specific review.

Question 2

When does a commercial building need equipment support steel?

Accepted Answer

Equipment support steel is typically required when adding new heavy equipment to an existing roof, upgrading to larger mechanical units, or installing ground-mounted generators and transformers that require elevated clearance, vibration isolation, or leveling on uneven surfaces.

Question 3

How are rooftop equipment frames priced?

Accepted Answer

Pricing is based on the total steel weight, material grade, complexity of fabrication, required finish (primer, paint, or galvanizing), and current material costs. We provide quotes based on your specific equipment dimensions and project requirements.

Question 4

What information is needed to quote a generator support frame?

Accepted Answer

We typically need the generator's make, model, wet weight, dimensions, required elevation, vibration-isolation requirements, and site conditions. A manufacturer's cut sheet helps the team review the quote request.

Question 5

Can equipment screens be fabricated to project dimensions?

Accepted Answer

Equipment screens can be fabricated to project-specific dimensions. Concealment, airflow, maintenance access, attachment, and wind-load requirements must be confirmed for the project.

Question 6

Does the customer provide engineering?

Accepted Answer

Typically, yes. USA Structural is a fabrication facility. Final design, anchorage, loading, wind, seismic, roof, and installation requirements generally require review by your project's Engineer of Record. We can coordinate with engineering partners if requested, but we do not automatically provide stamped engineering.

Question 7

What finish options are available?

Accepted Answer

Finish options include standard primer, project-specified paint systems, and hot-dip galvanizing. The appropriate finish depends on exposure, project specifications, and maintenance requirements.

Question 8

What drawings or photos are needed for a quote?

Accepted Answer

For new construction, provide structural and architectural drawings. For retrofits, provide equipment cut sheets, roof framing plans (if available), and clear photos of the existing field conditions. The more information provided, the more accurate the budgetary quote.

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