Is an Engineer Required for My Deck Project in Arkansas?

Arkansas cities — Little Rock, Fort Smith, Fayetteville, Springdale — generally require an engineer-sealed plan set for any deck that leaves the prescriptive path, and the PE seal is the standard requirement for the structural sheets. The seal must show the engineer's name, Arkansas PE number, and date, with the engineer in responsible charge. Simple ground-level decks can often be permitted from the prescriptive span tables, but ledger-attached decks, decks over 30 inches above grade, and decks carrying a hot tub or roof load are treated as engineered work in Arkansas. Owner-builders don't escape the requirement: the building department asks for the seal regardless of who drew the plans, and the engineer must design the deck for New Madrid seismic risk and expansive soils.

The engineer designs the footings for footings on expansive soils in the east — the engineer sizes piers for swell where the New Madrid zone also demands bracing, and details the ledger connection with seismic lateral ties on attached decks — eastern Arkansas reviewers want positive house connections for earthquake forces. Guards, stairs, and lateral bracing go on the sealed plan set — guard height and infill spacing, stair stringer sizing, and the bracing that keeps the deck from racking under New Madrid seismic risk and expansive soils. Bring a plot plan with setbacks, the deck's dimensions and height above grade, and photos of the house wall where the ledger will attach. Eastern Arkansas decks sit in the New Madrid zone — the engineer adds seismic bracing that standard prescriptive deck plans leave out.

Use this checklist before engaging an engineer for your deck: • Engineer of record holds an active Arkansas PE license, verifiable on the state roster • Footings designed for New Madrid seismic risk and expansive soils on the lot • Ledger connection detailed to the house band joist, never the veneer • Lateral bracing and hold-down designed for New Madrid seismic risk and expansive soils • Guards and stairs drawn to code (guard height, infill spacing, stringers) • Hot tub or roof loads called out and framed for where the deck carries them • Post bases and hardware specified for the local exposure • Engineer confirms they'll respond to plan-check corrections on sealed sheets