Pallet Racking in Phoenix, AZ

Seismic Design Category:

Phoenix adopted the 2024 Phoenix Building Construction Code effective August 1, 2025. It is based on the 2024 International Building Code, which references ASCE 7-22. Seismic Design Category is not a fixed letter for the city. It is determined per ASCE 7-22 from the building’s risk category, the mapped spectral response values at your address, and the site class established by geotechnical data, and a registered engineer assigns it for your specific site.

Engineering:

ASCE 7-22 revised the seismic hazard maps and expanded the site class system, so parameters pulled under an older code cycle do not carry over to a new submittal. Anchor and base plate calculations are part of every permitted racking package. For racks with a height-to-depth ratio over 6, those calculations must also cover a 350 lb live load applied at the top shelf of an entirely empty frame, directed perpendicular to the aisle, per ANSI MH16.1 Section 8.1 and MH16.3 Section 9.1.

High-Piled Combustible Storage:

The Phoenix Fire Code is an amended version of the 2024 International Fire Code, and Chapter 32 governs high-piled combustible storage. A construction permit is required for installation of or modification to a high-piled storage area exceeding 500 square feet, and that 500 square feet includes the aisles, not just the rack footprint. A separate operational permit is required to use a building or portion of one with more than 500 square feet of high-piled storage. Group S, F, and M speculative buildings with an interior clear height greater than 12 feet also fall under the chapter.

Sprinkler Coordination:

The high-piled storage submittal has to show sprinkler design criteria for every high-piled area, aisle dimensions between each storage array, commodity classification, the location of valves controlling ceiling and in-rack sprinklers, and the location and hardware of required fire department access doors. Rack layout and sprinkler design are reviewed together, so a change to beam elevations after approval reopens the fire review.

Load Capacity:

Anything outside the reduced submittal category requires complete structural loading, drawings, and calculations for the racks, anchors, and slab in accordance with ANSI MH16.1 or MH16.3. The reduced category caps out at 2,500 lbs total supported by any one level, a height-to-depth ratio under 8, and a 12 foot rack height. Design structural loading must be stated on the drawings at every permit level above the exemption.

Anchoring:

Details and calculations for anchors and base plates are required on every permitted racking submittal, along with a structural special inspection certificate for the anchors. The slab is part of the review, not an assumption: the Planning and Development Department publishes a separate technical document covering acceptable design of slabs-on-ground supporting storage racking. Manufacturer maximum load plaque locations have to be shown on the submittal as well.

General Duty Clause:

Arizona runs an OSHA-approved state plan through the Arizona Division of Occupational Safety and Health, a division of the Industrial Commission of Arizona with its main office in Phoenix. It covers most private sector workplaces in the state and has adopted the federal standards by reference. No federal standard addresses storage racks directly, so rack collapse, overloading, and damaged uprights are cited under the general duty clause.

Ongoing Compliance:

Manufacturer maximum load plaques are required per ANSI MH16.1 Section 1.4.2, must be posted in conspicuous locations, and must be at least 50 square inches. Keep damage inspections documented and dated. Arizona inspections can follow a work-related accident, a complaint, a referral from another agency, or a planned visit, so the written record is what you hand over when someone shows up.

Pre-Install Engineering Review:

Before any steel ships, our team audits your order against your site dimensions, forklift class, and pallet specs. We catch specification errors before they leave our facility – and we document everything so your receiving team knows exactly what to expect at the dock.

Post-Install Verification:

After install, we verify anchor placement and base plate seating against the approved drawings and coordinate the structural special inspection of the anchors that the Phoenix permit requires. Load plaques go up before the racks are loaded, in the locations shown on the submittal.

Zoning Compliance:

Warehouse and industrial racking projects in Phoenix generally sit in the A-1 Light Industrial District, Section 627 of the Phoenix Zoning Ordinance, or the A-2 Industrial District, Section 628. In A-1, building height is capped at 56 feet, with up to 80 feet allowed by use permit with a specific plan of development, and a warehouse may request up to 110 feet.

Site-Specific Checks:

Zoning governs the building envelope rather than your rack height, but the two meet when you stack toward the roof. Confirm the parcel’s district and any overlay before you fix top beam elevation, since parcels inside approved transit oriented development boundaries can fall under the Walkable Urban Code instead of the underlying industrial district.