60 ft clear span
Sixty feet is where the alternatives start dropping away and the rigid frame becomes the obvious answer rather than one option among several. It is also the width at which the tapered column starts earning its shape.
Priced as a 60 × 120 ft building at a 20 ft eave, 25 ft bays, 20 psf ground snow on the ASCE 7-16 basis, 115 mph wind, no crane — a case that matches what actually gets built at this width. Change any of it in the calculator.
Framing steel
3.00 – 4.20 lb/sf
Primary and secondary, 11 – 15 tons total
Building package
$15.00 – $18.00/sf
$108K – $130K over 7,200 sf
Installed
$23.25 – $34.20/sf
$167K – $246K, before interior buildout
Modular would save
nothing
No saving at this width
At this span: The practical floor for commercial work. Below this width, small-building suppliers price better.
The short answer
Clear span, tapered columns, one crane, catalog engineering, no splices. This is the easiest building in the table to buy, and the width where competitive quoting really begins.
Planning-stage estimate calibrated to published industry ranges. Not a substitute for a stamped design by a licensed engineer.
Geometry that follows from the width alone, at this page's 20 ft eave. These are planning rules, stated so they can be argued with — the derivations are on the methodology page.
| Dimension | At 60 ft | Why it matters |
|---|---|---|
| Frame depth at the haunch | 29–36 in | Span/25 to span/20. The deepest point of the frame, at the knee, where the moment peaks. |
| Clear height at the sidewall | 17–17.6 ft | Eave height minus the haunch. The height you can actually use in the first bay in from the wall; clearance rises toward the ridge. |
| Rafter half length | 30 ft | Haunch to ridge. What has to get on a truck. |
| Shipping pieces per half | 1 | One piece. Standard flatbed, no permit, no field splice. |
| Deflection allowance, L/240 | 3 in | Allowable midspan movement with a non-plaster ceiling, per IBC Table 1604.3. The weight model behind this page checks none of it. |
| Engineering | Standard | Inside the 150 ft ceiling for a standard single-span rigid frame. Expect a quick, comparable quote from several bidders. |
Post-frame and light tube-frame suppliers thin out above about 60 ft: members get deep, connections get fussy, and the systems lose the simplicity that made them cheap. Bar joist on masonry still works, but you are now paying for two structural systems and a mason.
The rigid frame, meanwhile, has barely started to work hard. At 3.00 – 4.20 lb/sf of framing steel it carries the width without deep sections or exotic detailing, and the package sits comfortably inside the range commonly quoted across the industry.
Below 60 ft the frame selector picks a straight, constant-depth column: the weight penalty is small and a flat inner face is easier to build against. At 60 ft it switches to a web-tapered column, because from here the moment diagram is steep enough that following it saves real steel.
That is the first genuinely structural thing to change as you widen a metal building, and it is why sidewalls in commercial buildings are wedge-shaped where sidewalls in small shops often are not. You can still buy a flat face at this width for racking or liner panel — it has just become a usability premium rather than a free choice.
This is the narrowest width at which crane bays, riding arenas and worship spaces appear in the application profiles, and none of the three is a coincidence. All three need a floor with nothing standing in it, and 60 ft is about where a column-free floor becomes worth designing a building around rather than a happy accident of a small footprint.
The uses whose typical width covers 60 ft, and what drives the geometry in each. A use that does not appear here is not impossible at this width — it is just not where it usually lands.
| Use | Typical width | Typical eave | What sets the geometry |
|---|---|---|---|
| Crane Bay / Manufacturing | 60–150 ft | 24–45 ft | Hook height drives the eave, and the crane runway loads the frame in a way roof snow never will. Usually clear span. |
| Riding Arena | 60–150 ft | 14–20 ft | A regulation arena floor cannot have columns in it. Width is set by the discipline, not the budget. Usually clear span. |
| Self-Storage | 30–60 ft | 9–12 ft | Unit module and drive-aisle width. Single slope drains away from the doors. Usually single slope. |
| Church / Worship | 60–120 ft | 16–28 ft | Unobstructed sightlines to the chancel. Clear span is the whole point of the building. Usually clear span. |
| Agricultural | 40–100 ft | 14–20 ft | Equipment turning radius and the angle of repose of whatever is stored in bulk. Usually clear span. |
| Retail / Office | 40–80 ft | 12–20 ft | Street presentation and parapet detailing. Frame cost is a minor line next to the facade. Usually single slope. |
Neither, in the sense that it does not matter. At 60 ft a modular frame saves nothing measurable: the column, its footing and its connections cost about what the span relief is worth. Take the clear floor, because it is free.
The frame selector's own recommendation for this case, with interior columns permitted, is a Clear Span frame with tapered columns. Web-tapered members follow the moment diagram and are the lightest way to carry this span.
Next step
A dealer quoting your actual geometry and load case beats any estimator, including this one. Three of them, each carrying engineer-stamped drawings for your state, cost you nothing to ask.