Pallet racking in Spring, TX.

No. Spring is unincorporated Harris County, which means the Harris County Fire Code governs rather than the Houston Fire Code, and the difference is substantial for racking. Harris County requires an operational permit to use a building or portion of one with more than 500 square feet of high-piled combustible storage including aisles, plus a construction permit for installing or modifying a structure with more than that amount. The City of Houston threshold is 2,500 square feet. A rack system that needs no operational permit inside the city can require two permits here, so this is worth settling from the parcel before any drawings are issued.

Under the Harris County Fire Code, a high-piled storage permit is renewed annually, or sooner if the pathway or movement through the building changes. For an operator that means two things. First, compliance is ongoing rather than a one-time approval at install. Second, a rack reconfiguration that changes aisles or egress routes is itself a trigger, so a relayout should be planned with the renewal in mind rather than treated as an internal change. We keep the as-built rack drawings and the high-piled storage plan current so a renewal is a document you already have rather than a survey you have to commission.

Flow rather than density, most of the time. Last-mile operations turn inventory quickly and touch a lot of it, so the constraint is usually pick-face access and dock throughput rather than how many pallets fit in the cube. That tends to favour selective with a carton-flow or shelving pick face, generous staging depth at the dock line, and aisle widths set by the equipment actually working the floor. Deep density systems can be exactly wrong in this setting — they store more and slow everything down. We design from velocity and order profile, and produce a layout before anything is ordered.