Property DevelopmentWestern OhioDayton

Southwestern Ohio Educational Purchasing Council

Greeneview Local Schools 2022 Modular Building Project

Greeneview Local Schools' transportation staff have permanent offices at the bus barn outside Jamestown: a 24-by-60-foot modular building with four offices, two ADA-compliant restrooms and an open meeting area, set on a permanent engineered foundation with an aluminum ramp and steps. Prodigy handled it as design-build, from the stamped foundation and site drawings and the Greene County permit to the concrete piers, setting and skirting the unit, the electrical service, and the trenching for water and sewer, under the district's SWOEPC cooperative contract.

Greeneview Local Schools needed working office space at its bus barn outside Jamestown, Ohio — somewhere for transportation staff to sit, meet and use a restroom without driving back to the district office. Instead of building from scratch, the district bought a 24 by 60 foot doublewide modular unit, new in 2021, and had it set on a permanent foundation at the bus barn site under an SWOEPC design-build contract.

The unit holds four 12 by 12 offices, two ADA-compliant restrooms and an open central meeting area, finished with VCT flooring and VCG wall finish. It sits on 32 below-grade concrete piers, 24 inches round by 36 inches deep, block leveled with seam seal at 35 inches above finished grade on single-stack CMU. Painted T1-11 wood skirting closes the crawl space with cross-drive anchors. Access is by new adjustable OSHA-compliant aluminum steps and a 36-foot straight-run aluminum ramp with a rest platform, with a switchback available if the site slope called for one.

Getting services out to it was its own job. The electrical work reused the existing raceway, the 200-amp meter and the existing 200-amp 120/240-volt panel left from the site's temporary power setup, feeding a 100-amp trailer panel off an existing breaker and a 125-amp trailer panel off a new one. Plumbing meant two trenches: roughly 150 feet at about four feet deep to tie the drain into the existing PVC main, and roughly 200 feet at 48 inches deep from the waterline tie-in on the east side of the main building. Prodigy produced the stamped engineered foundation and site plan drawings and filed the architect permit with Greene County. The district ends up with permitted, finished office space at the bus barn.

Wrapped modular building section on its transport chassis before placement at Greeneview

Interior of the completed Greeneview modular classroom before furnishing

Open classroom space inside the Greeneview modular building, with white wall panels, tile floor and wood doors

Corner of a Greeneview modular classroom showing an open wood door into the adjoining room

Technical Discussion

Modular saves the building, not the site

A 24-by-60 doublewide arrived at the Greeneview bus barn with four offices, two accessible restrooms and a meeting area already framed, finished and inspected. That is what modular buys: the interior, the trades that build it and the weather they would have worked in. Everything under and around the box still had to be built on site, and that is where most of the schedule and the site cost lived.

Section of the Greeneview modular building on 32 concrete piers with its floor 35 inches above grade, and the 36-foot aluminum ramp with a rest platform rising to it at 1 in 12. — Figure 1 — The ramp length is a site fact set by how high the finished floor ended up.

The foundation and the ramp

The building sits on 32 concrete piers, each 24 inches round and 36 inches deep, on a stamped foundation plan filed with Greene County. It is block-leveled at 35 inches above finished grade. That number sets the ramp. Accessible ramps run no steeper than 1 in 12, so a 35-inch rise needs at least 35 feet of run, and a ramp may climb no more than 30 inches between landings. The contract carries a 36-foot straight aluminum ramp with a rest platform, and a switchback if the slope of the site had required one. The ramp is a fact about the site, not the building.

The utilities

Water and drain were extended from the main building rather than from a new service. The drain trench runs about 150 feet at roughly 4 feet deep to the existing PVC main, bedded in pea gravel after inspection. The water trench runs about 200 feet at 48 inches deep, below frost, carrying a continuous 250 psi line with a ball-valve shutoff where it enters. Both runs carry tracer wire so they can be located later. Power reused the existing 200-amp meter and panel: a 100-amp breaker already in the panel feeds one trailer panel through 1-1/4 inch conduit, and a new 125-amp breaker feeds the other through 1-1/2 inch conduit.

The site

The parking area was expanded on gravel, 270 feet of old chain link came out, 230 feet of 6-foot fence went in, and the entrance received a 30-foot cantilever sliding gate with an electric operator.

When a modular building is priced, ask for the site work as its own number. The box is a catalog price. The piers, the ramp, the trenches and the fence are the project.

Our Work