Bolted
From inside the unit.
Trades enter finished rooms and work corners they can barely reach. The module was complete until someone had to crawl back in to join it.
Prefabricated Design Systems
Land. Lock.
Rise.
Patented modular connections for volumetric buildings that lock from the outside.
01 — The problem
Modular still gets joined the old way: bolted from inside, or welded on site.
Welded
Cost back on the site.
Field welding is slow, skilled, and expensive. It puts the cost of development back where prefabrication was meant to take it out.
We lock from the outside. The room stays closed.
02 — The system
A connection made for quick deployment.
Not interior bolts. Not field welds. Modules land complete, lock from the exterior, and keep rising.
01
External lock
Every joint is reached from outside the unit. Interiors stay closed, finished, and protected.
02
Continuous stack
Load travels from foundation to roof, floor after floor. The building rises as a single system.
03
Factory-born
The connection is designed into the module. The site only has to lock it.
03 — Deployment
Four moves. Then occupancy.
01Fabricate
Volumetric modules leave the plant complete—structure, envelope, interiors.
02Mobilize
Single-truck loads. Site work runs in parallel with the factory.
03Land
Crane-lowered onto the stack. Indexed. Aligned.
04Lock
Exterior fasteners close the joint. The next module can land.
04 — Methodology
Prefabrication, practiced as a system.
Volumetric modular
Rooms as structural units—apartments, stairs, shafts, corridors—built complete and stacked.
Industrialized production
Repeatable assembly-line fabrication. Tighter tolerances than the weather will ever allow.
Parallel critical path
Factory and foundation move at the same time. The crane is the last mile, not the whole job.
Design for assembly
Lock from the outside. No trades back inside finished rooms. No field welds to inflate the job.
05 — Intellectual property
Modular Construction Connection Mechanism
Held and licensed by Prefabricated Design Systems. A family of granted U.S. patents covering the system that secures volumetric modules from an external position.
06 — Inquire
License the lock.
For developers, manufacturers, and partners building with volumetric modules.