Rooftop HVAC
Rooftop HVAC Replacement Evaluations
Review of existing and replacement HVAC equipment, including operating weights, support points, location, curbs, and relevant attachment conditions. This is the most common request when a rooftop AC unit is being replaced and a permit requires engineering review.
What the evaluation reviews
- Replacement equipment or new installation?
- Number of units
- Existing equipment manufacturer/model
- Proposed equipment manufacturer/model
- Existing and proposed operating weights, if known
- Same location or relocated?
- Existing curb, adapter, new curb, or unknown?
- Framing type, if known
- Existing plans available?
- Permit application started? Permit number?
- Correction notice received?
- Short project description
Even a lighter replacement unit can shift support points or change anchorage conditions. The specifics of your project determine what engineering documentation is appropriate.
Related services
Roof Load-Capacity Evaluation
Assessment of existing roof framing and supports for proposed equipment or other specified roof loads.
When to request: When you need to know whether the existing roof can support a proposed addition or change.
Request This ServiceEquipment Anchorage Evaluation
Review or design of equipment attachments for applicable project-specific forces, including wind and seismic effects where relevant.
When to request: When equipment attachments and their resistance to wind/seismic forces need review.
Request This ServicePermit Correction and Plan-Check Response
Review of structural comments from the permitting authority and preparation of an appropriate engineering response within the agreed scope.
When to request: When the city has issued structural corrections on a permit or plan check.
Request This Service