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IndustryGlossary Term

Prime Contract

The main agreement between an owner (operator or developer) and the general contractor managing a project. As a subcontractor, you work under this contract without being party to it. Its terms often flow down and directly affect your scope, schedule, and payment conditions.

Related Terms

Modular Above-Ground Storage

Industry

Prefabricated, relocatable tanks or containment units installed on-site without permanent foundations. Subcontractors use them for temporary fuel, water, or chemical storage on remote or fast-moving job sites. Their modular design speeds up mobilisation and reduces civil work costs.

Wellpad

Industry

A prepared, levelled site where one or more oil or gas wells are drilled and completed. Subcontractors often mobilise to a wellpad for multi-well scopes, making it a key unit for planning labour and equipment. Pad size and well count directly affect job duration and invoicing cycles.

Leasehold

Industry

Land or mineral rights an operator has legally secured through a lease agreement with the landowner or Crown. Subcontractors typically work within leasehold boundaries, so access, permitting, and site rules are set by the operator holding the lease. Understanding leasehold limits helps crews avoid trespassing on adjacent unlicensed areas.

Electrohydraulic (eh) Control System

Industry

A control system combining electrical signals and hydraulic power to operate valves, actuators, and process equipment. Subcontractors working on commissioning or maintenance must be qualified to work on both electrical and hydraulic components. Specialised certification and intrinsically safe tools are typically required on-site.

Material Takeoff

Industry

A detailed list of all materials, quantities, and specifications needed to complete a scope of work. Subcontractors use it to prepare accurate bids and avoid costly shortages or overruns in the field.

Cable-Stayed Bridge

Industry

A bridge structure where the deck is supported directly by cables anchored to vertical towers. Subcontractors working these sites face complex rigging, height work, and strict load management requirements. Specialised certifications for working at elevation are typically required.

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