Central Michigan · Est. 1890
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Sizing a pole building

Bay spacing, door openings, and clear height for equipment.

October 22, 20256 min readDeWitt Lumber

Almost everyone who builds a pole barn wishes it were bigger. Sizing it around what you will store in five years, not what is in the driveway today, costs surprisingly little at the framing stage.

Start with the biggest thing going inside

Measure your tallest and widest equipment with attachments on and add clearance for the door track and lights. Clear height is the number people underestimate most often.

Bay spacing and post size

Eight- and ten-foot bays are standard and let you use common truss and purlin spans. Wider bays mean bigger posts and headers — sometimes worth it for an unobstructed equipment wall.

Plan the openings now

Door and window locations affect post layout, so decide before the holes are dug. Leaving a header in for a future overhead door is far cheaper than cutting one in later.

Talk it through with us

Bring your plans, sketches, or photos to any of our four Central Michigan yards. We will walk the options with you, pull real samples, and put together a material list you can build from. Estimating is free for any project.

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Four Central Michigan yards, real samples, and staff who have answered this question before.

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