Transport and setting: what owners get wrong

Owners spend a lot of time on module design and plant selection, then treat the drive from the factory as a detail. It isn't. Transport and setting decide the size of your modules, the cost of your project and, on set days, whether your schedule holds.

Width rules shape your floor plan

Federal rules set the standard width for commercial vehicles on the National Network of highways at 102 inches, with an exception for Hawaii. FHWA confirms that cargo hanging past that width requires an overwidth permit. Most building modules are wider than 102 inches, so most module loads move under permits.

The federal government doesn't issue those permits. FHWA states plainly that oversize and overweight permits are a state option, and that you need to contact each state you plan to travel through. A module crossing three states needs three sets of approvals, and each state can set its own rules on route, escorts, travel hours and days.

The practical effect: your module width, length and height are limited by the most restrictive state, road, bridge or overpass on your route. Settle the route before you lock module dimensions.

Mistakes we see owners make

Assuming the plant handles everything. Some manufacturers deliver to the site, some deliver to a staging yard, and some only load the truck. Find out where their responsibility ends.

Ignoring the last mile. Highway routes are usually well mapped. The final few miles on local streets are where trouble shows up: tight turns, low wires, trees, parked cars, weight limits on small bridges, and local rules about when oversize loads may travel.

Not planning a staging area. If modules arrive faster than the crane can set them, they need somewhere to wait. If they can't wait on site, you may need a nearby yard and a shuttle plan.

Underestimating the crane. Crane size depends on module weight and how far the crane must reach. A tight urban lot can force a much larger crane than the module weight alone suggests. Get a lift plan from a qualified crane company early, and confirm ground conditions where the crane will sit.

Leaving weather protection vague. Modules are often wrapped for the trip, but once the wrap comes off and the modules are set, any open joints are exposed until the roof and marriage lines are closed. ICC/MBI 1200 addresses weather considerations as part of on-site assembly. Put weather protection in someone's scope by name.

Scheduling set days too tightly. Set days depend on trucks, escorts, permits, crane and crew all arriving together. One late truck can idle a crane that bills by the hour. Build slack into the delivery sequence.

How fast can setting go?

When it's well planned, quite fast. McKinsey's report says one team of five workers can assemble up to six 3D modules per day. Treat that as an upper bound for planning, not a promise. Your real pace will depend on module complexity, crane reach, weather and how fast trucks arrive.

Who should be in the room

Hold a transport and setting meeting well before production starts. Include:

• The manufacturer's logistics lead
• The trucking or heavy-haul company
• The crane company and the setting crew
• The GC and site superintendent
• The engineer responsible for connections

Walk the route on a map, then drive the last few miles. Agree on delivery sequence, staging, crane location, and who calls a stop for wind or weather.

Questions to ask your transport and set partners

• Who applies for permits in each state, and how long do they take?
• Are escorts or police required on any part of the route?
• What hours and days can loads travel in each state and city?
• What is the crane's lift capacity at the reach this site needs?
• Who carries cargo insurance, and when does liability pass from hauler to setter?
• What is the plan if a truck is late or a lift is called off for wind?

The bottom line

Treat transport and setting as their own design problem, with their own owner, budget and schedule. Settle the route and the crane before module sizes are final, and put every handoff in writing.

A note on set-day safety

Set days are among the highest-risk days on a modular project. Heavy loads swing overhead, workers connect modules at height, and the schedule pushes everyone to keep moving. Ask your crane company and setting crew for their lift plan, their rigging approach and how they handle fall protection when workers connect modules at the edge. Make sure everyone on site knows who has the authority to stop work, and agree on wind limits before the first truck arrives rather than arguing about them on the day.