Asce 7 22 Portable May 2026

1. Portable Document Format (PDF) – Most Common Meaning

4. “Portable” as in Relocatable Structures (Misreading?)

4. Comparison: Portable vs. Permanent Design under ASCE 7-22

| Parameter | Permanent Building | Portable Unit (ASCE 7-22, Ch. 29) | |-----------|--------------------|-------------------------------------| | Return period wind | 300–1700 years | 50–300 years (reduced) | | Importance factor (I) | 1.0–1.5 | 0.87–1.0 (lower allowed) | | Snow load factor | 1.0 | 0.75 (if <1 year service) | | Seismic design | Required | Usually exempt if unanchored & light | | Anchorage design | Foundation & bolted | Ballast or removable anchors | | Inspection requirement | Once at construction | Before each setup (per ASCE 7-22, 29.1.3) |

Pitfall #1: Ignoring the "Transient Wind Event" During Transport

ASCE 7-22 does not cover transport on a flatbed truck (that is DOT), but it does cover wind during setup. If a crane is holding your portable building 20 ft in the air during erection, that is a "portable condition." Many engineers forget to check the 3-second gust load on an unanchored, suspended unit. The result: swing, impact, and collapse. asce 7 22 portable