A project phase where construction work is ongoing while equipment or materials are still in transit to the site. Subcontractors must coordinate mobilisation and scope carefully to avoid costly downtime waiting on delayed deliveries. Billing milestones and crew schedules should account for this overlap.
Transit-Active Construction
Related Terms
Facility Tie-in
IndustryThe process of connecting new pipelines, equipment, or infrastructure to an existing operating facility. For subcontractors, tie-in work often requires strict hot-work permits and coordinated shutdowns with the operator. Scope can expand quickly, so clear change-order procedures are essential before mobilising.
Infrastructure Build Cycle
IndustryThe period spanning initial site development through to project completion, during which subcontractors see peak demand for civil, mechanical, and electrical trades. Work volumes are highest in early and mid-cycle phases. Subcontractors should plan crew capacity and equipment availability around these predictable surges.
PAC (Polyanionic Cellulose)
IndustryA water-soluble polymer additive used in drilling fluids to control fluid loss and stabilise boreholes. Subcontractors handling mud systems must store and mix PAC carefully, as improper use affects drilling performance. It is commonly specified in drilling programmes, so field crews should follow the mud engineer's exact dosage instructions.
Candu (canadian Deuterium Uranium) Reactor
IndustryA Canadian-designed nuclear reactor that uses heavy water as a moderator and coolant. Subcontractors working on maintenance or upgrades face strict nuclear regulatory compliance and specialised certification requirements. Expect rigorous site access controls, radiation safety training, and detailed documentation standards.
Frontage Road
IndustryA secondary road running parallel to a highway, providing access to adjacent worksites, lease roads, or staging areas. Subcontractors often use frontage roads for heavy equipment moves or crew dispatch without entering main traffic. Confirm load restrictions and municipal permits before routing oversized hauls.
Portable Crusher
IndustryA mobile machine that breaks down rock, concrete, or aggregate on-site, eliminating haul-off costs. Subcontractors often supply or operate these units under equipment rental or crushing contracts. Commonly used in pipeline trenching, site prep, and demolition scopes.
Latest Industry News
Jacobs-PCL Wins $1B SF Plant Upgrade Built Around Live Operations
SFPUC picked a Jacobs-PCL joint venture for a $1 billion progressive design-build nutrient reduction project at its largest treatment plant. The plant must keep running during construction, which shapes how subs should pursue early involvement.
20 hours agoIndustryWelspun Wins $580M Pipe Order for Permian Gas Line Feeding Data Center
Welspun Tubular won a roughly $580 million order to supply coated steel pipe for a Permian Basin natural gas pipeline serving a hyperscaler data center complex. Deliveries are expected in fiscal year 2029.
20 hours agoIndustryXcel Energy Sets $70B Plan With 9.2 GW Renewables, 2.3 GW Storage
Xcel Energy's five-year capital plan rises 17% to $70 billion, with 9.2 GW of renewables, 2.3 GW of storage, 3.3 GW of gas and 2,400 miles of new transmission. Here is what the plan means for foundation, collection and substation crews.
20 hours agoIndustryAEP Lifts Capital Plan 30% to $100B as Data Center Load Hits 84 GW
AEP raised its five-year capital plan to $100 billion, with $37 billion for transmission and $20 billion for gas generation. A 10.4-GW Ohio data center campus drives the load growth, and three 765-kV lines are slated for 2028 through 2030.
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