Contractor Interface Risk: When Two Safe Methods Meet

Every contractor submits a method statement for its own work. Nobody submits one for the place where two of them overlap. That gap is where simultaneous operations go wrong.

Overhead lifting above a crew working below, hot work close to stored materials, and excavation next to a loaded access route are all common examples. Each activity may be assessed correctly in isolation.

Find the interfaces early

• Overlay the short-term programme on the site plan and mark where activities share a zone or level.
• Look vertically as well as horizontally: above, below and adjacent.
• Check shared routes, shared plant and shared temporary services.
• Ask each contractor what they need from, and what they might do to, the neighbouring work.

Decide who controls the overlap

One named person coordinates each interface. Without that, each contractor assumes the other is managing it.

Typical controls

1. Separate the work in time or space where possible.
2. Where it cannot be separated, agree exclusion zones and who enforces them.
3. Make permits for the two activities refer to each other, using whatever SIMOPS or permit-conflict process the client or authority requires.
4. Agree a single stop and restart signal both crews know.
5. Review the arrangement at the daily coordination meeting.

Keep the register honest

Record interface risks in the project risk register with the contractors named and the coordinator as owner. Review them whenever the programme moves, because a delay is often what creates a new overlap.

"General practice guidance, not legal advice and not a statement of any authority's requirements. Permit, reporting, briefing and coordination rules are set by the applicable authority (for example ADOSH-SF in Abu Dhabi, Dubai Municipality, Trakhees, DSOA, JAFZA or the relevant emirate municipality), the client and the main contractor. Where they differ from this article, follow them."

Continue with

• Permits & High-Risk Work module — https://sitesafetyuae.com/modules/permits
• MSRA, HIRA and RAMS: What Each One Is For — https://sitesafetyuae.com/resources/msra-hira-rams-what-each-is-for-uae-sites

Site Safety UAE builds the HSE Operations Dashboard for UAE and GCC construction projects — permits, inspections, incidents and risk actions in one place. Start free, no card required — https://sitesafetyuae.com/get-started.