60x120 Steel Office Building

Quantities, not prices, are publishable here: roof cladding runs 7,589 square feet — 5% above the 7,200-square-foot floor at a 4:12 pitch — with 133.3 cubic yards of nominal slab beneath it. The corner nobody plans for is the one that fills first, which is an argument for planning it.

Enclosed rooms, acoustics and services distribution outweigh the desking. Cutting focus rooms saves the least and costs the most in use.

• interior partitions, ceilings and finishes across the whole floor
• the service core with restrooms and kitchen
• air handling for continuous occupancy
• small-power and data distribution density

This page is ordered around the door between the quiet side and the working side, because that interface is what a combined building actually has to solve.

The footprint holds 24 team zones — 4 across by 6 deep — and leaves 15 feet of depth for focus and call rooms at the floor's edge, so concentrated work has somewhere to go without booking a meeting room.

What distinguishes 60x120 is depth behaviour: 6 rows along 120 feet after 9 feet of circulation, with 15 feet unaccounted for at the end of the run. The floor treatment is a use decision that outlasts most of the equipment standing on it.

A 60 by 120 footprint is a clearly directional plan: 7,200 sq ft enclosed by 360 ft of wall, at a 2:1 length-to-width proportion. Along its 120 ft dimension it takes 7 runs of team zones at 16 ft, leaving 8 ft over — the 8 ft is where the argument about this size actually happens. An open floor works when the enclosed space that supports it exists. Focus rooms, call booths and a quiet edge are not extras; they are the parts that make the open area usable, and they are what get cut first. Acoustic separation is specified for the specific partitions and ceilings rather than assumed from a layout.

This footprint is planned as an open working floor with enclosed space for the work that needs it. Compared with a 60 by 90 of the same width, the extra depth here adds run rather than reach: it buys about 7 team zones in line, and every position past the second is retrieved by moving what stands in front of it. Spent as a square 85 by 85 instead, the same 7,200 sq ft would stand 5 team zones across rather than 3, and would trade this plan's length for parallel access. That is the width-against-depth decision this footprint has already made. At this size the building becomes a shared resource, and shared resources need a written rule for who parks where and which door is kept clear. The longest internal travel on a 60 by 120 plan is about 134 ft corner to corner, and the shortest useful one is the 60 ft cross-run. For a an open working floor with enclosed space for the work that needs it that matters where open plan office floor sits, because shortening the 60 ft run to serve it lengthens every trip along the 120 ft dimension. Data and power distribution are cheaper installed with the fit-out than added to it.

Nominal bay division computes to 5 bays at about 24 feet, wider than the 14-foot module — so a position can sit inside a bay without a frame line splitting it. Ground conditions and drainage decide the floor before the frame does.

With 6 rows deep, the rear row is behind the front one. Without a route past it, those team zones become storage positions rather than working ones — the real cost of depth at this width. Neighbouring buildings, setbacks and the approach road often decide the orientation before the plan does.

Extension is cheapest along the 120 ft dimension, where each added bay repeats work already framed; widening past 60 ft is a different frame rather than a longer one. Growing to 60 by 136 adds a 8th run of team zones — useful if the constraint is team zones rather than the 8 ft already spare at the far end.

Configured as an open working floor with enclosed space for the work that needs it, 60x120 is judged on whether the 24 team zones it holds match the operation, and on whether the 4 feet of spare width leaves the route this mode depends on.

• Does the work need four lanes across, or two lanes flanking an interior work hall, or does it need a second lane that this 60-foot span cannot give?
• Is the 120-foot length being bought for depth, or for the repeated bays — a long repeating bay sequence, so segment boundaries are set by bay lines rather than by walls?
• What finished ceiling height do you want, and what service zone sits above it?
• Where does the service core go, and does the desk plan work around it?

One opening per position works on this gable: 4 across 60 feet, with 4 feet of wall to distribute as piers. Splitting that margin evenly is what keeps the elevation buildable. A leftover strip earns its place only when something is deliberately put in it; otherwise it is circulation with a nicer name.

One main entrance plus daylight distribution, which is a window and depth question rather than a door one.

The work pattern this floor could equally be planned around is an office of individual rooms, planned around privacy and corridors: there is no support core, so shared functions sit in the corridor and every use of them is heard through two doors. Open desking in the centre with enclosed rooms on the perimeter, keeping daylight shared rather than walled into offices.

The 15-foot leftover depth is 900 square feet across the full width — deep enough to plan deliberately, and at this footprint it goes to focus and call rooms at the floor's edge, so concentrated work has somewhere to go without booking a meeting room. Two operations of the same size can want opposite plans, so the arithmetic below is a starting point rather than a recommendation.

The 4 feet of spare width runs the whole 120-foot length — 480 square feet of wall strip. It earns its keep as shelving, staging or a walking route, not as another team zone. An empty building looks generous and a working one rarely does; plan against the working state.

Compared with a 60 by 90 of the same width, the extra depth here adds run rather than reach: it buys about 7 team zones in line, and every position past the second is retrieved by moving what stands in front of it. Spent as a square 85 by 85 instead, the same 7,200 sq ft would stand 5 team zones across rather than 3, and would trade this plan's length for parallel access. That is the width-against-depth decision this footprint has already made. At this size the building becomes a shared resource, and shared resources need a written rule for who parks where and which door is kept clear. The longest internal travel on a 60 by 120 plan is about 134 ft corner to corner, and the shortest useful one is the 60 ft cross-run. For a an open working floor with enclosed space for the work that needs it that matters where open plan office floor sits, because shortening the 60 ft run to serve it lengthens every trip along the 120 ft dimension. Data and power distribution are cheaper installed with the fit-out than added to it. That movement pattern, not the 7,200-square-foot total, is what decides whether the leftover 15 feet is useful here.

Across a 60-foot span the 4:12 pitch adds 10 feet between eave and ridge. The centreline measures 30 feet; anything parked or stacked near a wall lives with the 20-foot eave. The plan should survive the day the largest item the operation owns has to come inside.

Height on a 60 ft span is a separate decision from the 120 ft length, and it is the span that sets the frame's behavior. Raising the eave over 7,200 sq ft affects every bay along the 120 ft dimension, so the test is whether open plan office floor genuinely needs the extra clear height or only the floor area.

Ventilation across 7,200 square feet at this height: continuous occupancy at desk density makes air handling a core system rather than an accessory.

• 30x100 moves the count from 24 to 12 team zones (2 across by 6 deep), which is the reason to choose between them.
• 50x60 moves the count from 24 to 9 team zones (3 across by 3 deep), which is the reason to choose between them.
• 40x80 moves the count from 24 to 8 team zones (2 across by 4 deep), which is the reason to choose between them.

Because this footprint is planned as an open working floor with enclosed space for the work that needs it, the useful next reads are different from the ones a differently shaped steel office building suggests: open plan office floor, focus and call rooms, daylight distribution.