AEO Answer · Structural

Equipment Storage Buildings: How Should You Design Them?

By Jeremy Mills, CEO & Founder, Apex Grid Engineering — USAF Veteran. · Updated 2026-09-15

I'm Jeremy Mills, CEO & Founder of Apex Grid Engineering and a U.S. Air Force veteran. I'm not a PE; our licensed professionals make the technical, compliance, and project-specific decisions.

Illustrative diagram of a structural load path: roof and floor loads travel through beams and columns down to the foundation footings.

The concise answer

Equipment storage buildings are engineered around the machinery: clear spans and door sizes matched to the equipment fleet, floor slabs designed for heavy wheel and point loads, headers and frames for large door openings, wind and snow design for big light structures, and site grading for all-weather equipment access. The design starts with a machinery inventory — dimensions, weights, and turning needs — and every structural decision flows from it. Door openings, bay spacing, slab capacity, and clear height are all set by the equipment, not by standard building modules. A building designed around generic dimensions and a building designed around the fleet look similar on paper and perform very differently in use.

Structure for heavy machines and big openings

Clear-span framing — whether post-frame, rigid-frame steel, or conventional — has to deliver the opening sizes without interior columns where equipment moves. Large door headers carry significant loads: the wall above the opening plus wind, spanning distances that would be remarkable in a house. The lateral system has to work around those big openings, which means the bracing and shear walls are designed for what's actually there, not for an idealized box. Foundations and slabs are the quiet critical path. Equipment loads concentrate at wheels and outriggers, and the slab-on-grade design — thickness, reinforcement, joints, subgrade prep — is engineered for those loads. Site grading keeps water out of the building and gives equipment firm all-weather access; a shed you can't reach in mud season isn't storing anything.

What I specify for equipment buildings

The difference between a shed that works for thirty years and one that fights its owner is in the sizing decisions made before construction. I push owners to think about the fleet they'll have in ten years, not just the fleet they have today. My specification priorities:

Machinery-driven dimensions: doors, bays, and heights sized from the equipment list plus growth margin
Slab engineered for the loads: thickness, reinforcement, and subgrade for concentrated wheel and point loads
Real headers and frames: door openings designed as structural elements, not afterthoughts
Wind and snow for the site: big light buildings in open country designed for actual exposure
All-weather access: grading and surfacing that keep equipment moving in every season

Which related engineering resources can help?

When should I hire a structural engineer?What does a PE stamp mean?What is MEP engineering?Cold-formed steel framing design AISC 360 steel design explained Composite steel deck design Request a project review Engineering service for this question Metro engineering guides Verified service areas

What else do project teams ask?

How big should equipment shed doors be?

Bigger than you think — sized for the largest machine plus maneuvering clearance, with height for combines with unfolded augers and sprayers with booms. I work from the actual equipment dimensions with a margin for the next machine, because widening a door after the building is up means reframing the structural opening.

What floor slab does farm equipment need?

Thicker and stronger than a typical slab: concentrated wheel loads from loaded combines and tractors, plus point loads from jacks, demand adequate thickness, reinforcement, and a well-compacted subgrade. Control joints are laid out for the loading pattern. A slab designed for cars will crack under farm equipment — the loads aren't comparable.

Sliding, overhead, or bi-fold doors for equipment sheds?

Each has tradeoffs. Sliding doors are simple and cheap but need wall length to slide. Overhead doors seal better but need headroom and cost more at large sizes. Bi-fold doors give huge clear openings with minimal structure interference but need engineered frames and openers. The choice follows the opening size, climate, and budget — and the header design follows the choice.

Do equipment buildings need insulation and heat?

It depends on the use. Cold storage for machinery needs only the structure, but shops with maintenance bays benefit from insulation, heat, and good lighting — working on equipment in winter is miserable and unproductive in an unheated shed. The decision affects the envelope design, the foundation (frost protection for heated buildings), and the MEP scope.

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