Documentation
Structural Engineering Letters and Stamped Calculations
A project-specific engineering letter explains the engineer's evaluation, findings, conditions, and limitations. Signed and sealed calculations are prepared by the appropriately licensed professional for the required structural scope. Either supports permit review — the permitting authority determines whether the submission satisfies its requirements.
Request DocumentationStructural Engineering Letter
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.
Request This ServiceStamped Structural Calculations
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.
Request This ServiceImportant distinction
A letter alone may or may not satisfy the permitting authority's requirements. An engineering letter is not an unconditional guarantee of roof safety. The appropriate deliverable depends on your project and your jurisdiction's requirements, determined after scope review.