Designing Portable Structures Under ASCE 7-22: A Comprehensive Guide

Step 3: The "Relocation Protocol"

The owner must have a manual stating that moving the unit 500 miles north requires re-evaluation of snow loads. Under 7-22, the property owner assumes liability if they move a unit from Arizona (low wind) to Oklahoma (tornado alley) without recertification.

  • ( 1.2D + 1.6W + 1.6L_transport ) (where ( L_transport ) is forklift/pick-up impact load—new in 7-22)
  • ( 0.9D + 1.6W_lifting ) (overhead crane picking up the unit—often 2x dead load)

3. Portable Load Combination Reference

(Note: Always check local amendments. Strength Design (LRFD) shown.)

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