Fully-Modular Buildings Through a Proposed Inter-module Connection

A comprehensive review and classification of inter-module connections for hot-rolled steel modular building systems

“…Type of locking device LD01 [50] Twistlock LD02 [51] Interlocking grooves LD03 [52] Rotary device and screwed nut LD04 [53] Self-locking plug-in device LD05 [54] Torque-activated pin device LD06 [55] Self-locking spring-activated tabs LD07 [56] Self-locking spring-activated sliding blocks…”

“…Despite the convenience of automatic locking mechanisms, this type of connectors consists of a very large number of complex individual components, putting a strain on the supply chain. Among the latest innovations in functional IMC systems is the device (LD05) introduced by Srisangeerthanan et al [54]. Integrated in the cast corners of the modules, a driven torque mechanism actioned by a tool slid through the SHS column translates a set of pins, interlocking the internal and external components.…”

“…However, the overlapping parts require a strict, sequential disassembly process, which hinders the potential for architectural flexibility in the scenario of intermediate module removal. Another attempt to optimise installation workflows was reported in the work of Wang et al [79], who proposed a bolted endplate joint located inside the SHS posts (CTC09), tightened with a long twisting tool from the top of the module, similar to the tool required by LD06 connection [54]. The weakness of this connection was in its large number of unique components and tedious welding tasks for pre-attaching the parts.…”