structmod — Modular & Mobile Structure Engineering https://structmod.com Technical articles on modular building systems, field hospitals, mobile infrastructure and prefabricated structures. en-GB Fri, 09 May 2026 00:00:00 +0000 Modular Construction below −25 °C: What Actually Fails https://structmod.com/blog/cold-climate-modular https://structmod.com/blog/cold-climate-modular Thermal bridges, drain lines, start-up sequencing, and the real failure modes of modular buildings in extreme cold. Lessons from Nordic defence and Andean mining. Mon, 14 Apr 2026 00:00:00 +0000 EN 1090 Execution Classes — EXC Determination Guide https://structmod.com/blog/en-1090-exc-3-explained https://structmod.com/blog/en-1090-exc-3-explained EN 1090 defines four execution classes (EXC-1 to EXC-4) for structural steelwork. EXC is derived from Consequence Class, Service Category and Production Category. Mon, 07 Apr 2026 00:00:00 +0000 FAT / SAT Protocols: Why Two Commissionings Matter https://structmod.com/blog/fat-sat-commissioning-protocols https://structmod.com/blog/fat-sat-commissioning-protocols Factory acceptance and site acceptance testing are not duplicated work — they are what keeps a modular project on schedule. A walk-through of our 142-point checklist. Mon, 31 Mar 2026 00:00:00 +0000 Modular vs Container vs Trailer — Which to Choose? https://structmod.com/blog/modular-vs-container-vs-trailer https://structmod.com/blog/modular-vs-container-vs-trailer Three build systems, three transport envelopes, three deployment profiles. A side-by-side guide for architects and procurement teams choosing between modular, container and trailer. Mon, 24 Mar 2026 00:00:00 +0000 72-hour disaster response: what has to be pre-built https://structmod.com/blog/seventy-two-hour-disaster-response https://structmod.com/blog/seventy-two-hour-disaster-response If you are not holding stock, you are not responding. Lessons from Türkiye 2023, Morocco 2023 and Ukraine 2022–24 on what to keep on the yard and what cannot be built on demand. Mon, 17 Mar 2026 00:00:00 +0000 Specifying a Level-2 field hospital in under two weeks https://structmod.com/blog/specifying-level-2-field-hospital https://structmod.com/blog/specifying-level-2-field-hospital A practical procurement checklist — bed count, surgical capability, sterile services, pharmacy, imaging, lab, utilities — for teams writing their first Level-2 hospital RFQ. Mon, 10 Mar 2026 00:00:00 +0000