100x100 Steel Warehouse Building

This page is ordered around height and clearance, because at 100x100 the 22-foot eave limits a steel warehouse sooner than the plan does.

The footprint holds 14 pallet blocks — 7 across by 2 deep — and the remaining 2 feet is marginal: there is no internal receiving area, so checking happens in the aisle and put-away stops while it does.

Efficiency is the useful number here: 714 square feet of enclosed floor per pallet block, against a 560-square-foot module. That leaves working slack around each position. The span is the commitment; everything inside it is rearrangeable later, and the 100-foot dimension is not.

A 100 by 100 footprint is a near-square plan: 10,000 sq ft enclosed by 400 ft of wall, at a 1:1 length-to-width proportion. Along its 100 ft dimension it takes 2 runs of pallet blocks at 40 ft, leaving 20 ft over — the 20 ft is where the argument about this size actually happens. A bulk floor deals in whole units rather than items, so the argument is about put-away and retrieval of large blocks rather than about picking. The receiving area is the part that decides whether the operation flows. Travel distance is the operating cost that grows fastest as a floor gets larger.

This footprint is planned as a bulk floor holding full pallets in transit. At 1:1 the plan is close enough to square that neither width nor depth is doing the arguing; what decides the layout here is where the openings go, because no proportion is forcing a direction on the floor. Spent as a square 100 by 100 instead, the same 10,000 sq ft would stand 5 pallet blocks across rather than 5, and would trade this plan's length for parallel access. That is the width-against-depth decision this footprint has already made. A building of this size behaves like a small yard under a roof: zones need to be defined, signed and left alone, or they migrate. The longest internal travel on a 100 by 100 plan is about 141 ft corner to corner, and the shortest useful one is the 100 ft cross-run. For a a bulk floor holding full pallets in transit that matters where bulk storage planning sits, because shortening the 100 ft run to serve it lengthens every trip along the 100 ft dimension. A shared goods-in and despatch opening serialises two flows that peak at overlapping times.

The stored configuration carries a 22-foot eave and computes to 38.7 feet at the ridge on a 4:12 pitch — a 16.7-foot rise across 100 feet. Height is therefore not uniform, and the sidewall is the constraint. An empty building looks generous and a working one rarely does; plan against the working state.

Stack height is limited by what the goods and the handling equipment allow rather than by the building, and both are confirmed with the supplier for the specific installation.

100 ft across takes 7 pallet blocks and leaves 2 ft. Across only 2 ranks of depth that leaves nothing spare for racking or a bench; those go outside the pallet block positions or not at all.

Nothing lands in the middle of a 100-ft clear width. The 2 ranks along the 100-ft length are the only fixed geometry the plan has; every other division is furniture.

100 ft divides exactly into 10 bays at 10 ft. Over 10,000 sq ft a single 10-ft grid is the difference between a plan and an accumulation.

A 22-ft eave puts 303,500 cu ft inside and makes the upper half a planning question in its own right. Framing for it now is a drawing change; adding it to a finished frame is a structural one.

The 100-ft gable clears about 92 ft after corner framing — 5 module-width openings abreast. The 100-ft sidewall takes up to 5 openings with piers between, which is where a second entry belongs.

400 ft of wall encloses 10,000 sq ft, against 400 ft for a square of the same area — a 0% difference. Little of the enclosure exists only because of the shape.

The handling pattern this floor could equally be run as is a cross-dock floor where goods are sorted rather than stored: there is no marshalling depth, so goods are broken down in the lanes and the second face waits for the first. Block storage takes the body of the floor, and a deliberate receiving area takes the dock end. The temptation is to store in the receiving area, and doing so is what makes each delivery a rearrangement.

The 2-foot leftover depth falls under the 13 feet this platform treats as usable for a steel warehouse, so there is no internal receiving area, so checking happens in the aisle and put-away stops while it does. Doors and their approaches decide more about daily use here than the enclosed area does.

Only 2 feet of width is spare, so there is no wall strip: anything set along a sidewall comes out of a pallet block's clearance. The building is fixed for decades while the operation inside it changes every few years, and the plan has to survive that.

At 1:1 the plan is close enough to square that neither width nor depth is doing the arguing; what decides the layout here is where the openings go, because no proportion is forcing a direction on the floor. Spent as a square 100 by 100 instead, the same 10,000 sq ft would stand 5 pallet blocks across rather than 5, and would trade this plan's length for parallel access. That is the width-against-depth decision this footprint has already made. A building of this size behaves like a small yard under a roof: zones need to be defined, signed and left alone, or they migrate. The longest internal travel on a 100 by 100 plan is about 141 ft corner to corner, and the shortest useful one is the 100 ft cross-run. For a a bulk floor holding full pallets in transit that matters where bulk storage planning sits, because shortening the 100 ft run to serve it lengthens every trip along the 100 ft dimension. A shared goods-in and despatch opening serialises two flows that peak at overlapping times. That movement pattern, not the 10,000-square-foot total, is what decides whether the leftover 2 feet is useful here.

Openings are the pinch point here. With 2 feet of spare width the gable cannot host 7 separate doors, so access is either shared or moved to the 100-foot sidewall. Ground conditions and drainage decide the floor before the frame does.

Dock openings sized to the vehicles served, with enough of them that a slow unload does not stop the next arrival. Two openings and a queue are usually better than one opening and a yard.

Handling equipment works between vehicle and racking, so staging depth in front of the doors is functional space, not spare space.

Nominal bay division computes to 4 bays at about 25 feet, wider than the 14-foot module — so a position can sit inside a bay without a frame line splitting it. The floor treatment is a use decision that outlasts most of the equipment standing on it.

With 2 rows deep, the rear row is behind the front one. Without a route past it, those pallet blocks become storage positions rather than working ones — the real cost of depth at this width. Two operations of the same size can want opposite plans, so the arithmetic below is a starting point rather than a recommendation.

Extension is cheapest along the 100 ft dimension, where each added bay repeats work already framed; widening past 100 ft is a different frame rather than a longer one. Growing to 100 by 140 adds a 3th run of pallet blocks — useful if the constraint is pallet blocks rather than the 20 ft already spare at the far end.

Configured as a bulk floor holding full pallets in transit, 100x100 is judged on whether the 14 pallet blocks it holds match the operation, and on whether the 2 feet of spare width leaves the route this mode depends on.

• Does the work need an interior street with independent zones on both sides and turning room at each end, or does it need a second lane that this 100-foot span cannot give?
• Is the 100-foot length being bought for depth, or for the repeated bays — eight to ten repeated bays, which makes the layout a scheduling problem as much as a spatial one?
• What racking height is planned, and is the clear height measured under the frame?
• Does the aisle module match the handling equipment you use?

• 50x80 moves the count from 14 to 2 pallet blocks (2 across by 1 deep), which is the reason to choose between them.
• 40x100 moves the count from 14 to 2 pallet blocks (2 across by 1 deep), which is the reason to choose between them.
• 60x80 moves the count from 14 to 4 pallet blocks (4 across by 1 deep), which is the reason to choose between them.

Because this footprint is planned as a bulk floor holding full pallets in transit, the useful next reads are different from the ones a differently shaped steel warehouse suggests: bulk storage planning, receiving area planning, dock provision.

The estimate at 100x100 moves with four computed quantities: 10,000 square feet of floor, 400 feet of perimeter, 8,800 square feet of wall and 10,541 square feet of roof. Everything else is site and specification. Neighbouring buildings, setbacks and the approach road often decide the orientation before the plan does.

Proportion drives cost here as much as size does: 400 ft of wall around 10,000 sq ft is 0.04 ft of wall per enclosed square foot, and a squarer plan of the same area would carry less. What moves the figure further on a a bulk floor holding full pallets in transit is the fit-out bulk storage planning implies, along with framed openings and the height chosen for the 100 ft span.

• clear height for racking positions
• the loading openings and their equipment
• floor requirements under racking and handling equipment, which are engineering items
• yard area for vehicle turning