Roof Structural Engineering

Evaluation of proposed loads and the ability of relevant structural members and connections to support them.

When to request: When proposed equipment or loads may change what the existing roof framing must carry.

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.

Review of existing and replacement HVAC equipment, including operating weights, support points, location, curbs, and relevant attachment conditions.

When to request: When a rooftop AC unit is being replaced and a permit or approval requires engineering review.

Review of the structural implications of adding equipment where an installation did not previously exist.

When to request: When new equipment is proposed where nothing was mounted before.

A project-specific letter explaining the engineer's evaluation, findings, conditions, and limitations. A letter alone may or may not satisfy the permitting authority's requirements.

When to request: When a jurisdiction or contractor has asked for an engineer's letter for a roof project.

Signed and sealed engineering calculations prepared by the appropriately licensed professional for the required structural scope.

When to request: When the permitting authority requires sealed calculations for the proposed work.

Engineering details for strengthening or modifying framing when the proposed project requires additional structural support.

When to request: When the existing framing needs to be strengthened to support the proposed work.

Evaluation of curbs, adapters, rails, platforms, and the transfer of equipment loads into the building.

When to request: When the path of equipment loads into the structure needs to be confirmed or designed.

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.

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.

An inquiry option for heat pumps, ventilation units, solar-related loads, added roofing materials, or other proposed loads, subject to confirmation of the offered service and project scope.

When to request: When the proposed load is not a standard rooftop HVAC replacement.

A guided intake option for customers who have been told they need roof approval, an engineer's letter, structural certification, or roof load calculations.

When to request: When you're not sure which engineering service applies to your situation.