Repair work performed after equipment has already failed or broken down. For subcontractors, it often means urgent mobilisation and unplanned labour costs. Scope can expand quickly, so clear change-order procedures are essential.
Corrective Maintenance
Related Terms
Long-Cycle
IndustryRefers to large capital projects with lead times and development phases spanning several years. For subcontractors, long-cycle work offers extended contract visibility but requires patience on mobilisation and payment timelines. Budget cycles and scope changes are common over the project life.
Mainline Pipe
IndustryThe primary, large-diameter pipe forming the backbone of a transmission or distribution pipeline system. Subcontractors are typically hired for mainline installation, coating, welding, or hydrotesting scopes. Work on mainline pipe often carries strict inspection and quality requirements.
Hydraulic Structures
IndustryBuilt infrastructure that controls or directs water flow, such as dams, weirs, cofferdams, and retention ponds. Subcontractors working near these structures often face strict safety and permitting requirements. Scopes may include installation, inspection, maintenance, or dewatering support.
Transmission Main
IndustryA large-diameter pipeline that moves water, gas, or other fluids over long distances at high pressure. Subcontractors are often hired for installation, inspection, or maintenance work on these lines. Strict pressure ratings and material specs govern all field work.
Kelly Bar
IndustryA heavy, telescoping steel rod that transmits rotary torque from a drill rig to the auger or cutting tool. Subcontractors operating foundation or piling rigs must inspect kelly bars regularly for wear and cracking. Damage affects drilling performance and can cause costly downtime on tight project schedules.
Below-Grade
IndustryAny work or structure located below the finished ground surface, such as buried pipelines, foundations, or conduits. Subcontractors must account for added costs like shoring, dewatering, and confined space compliance. Scope changes below-grade often trigger change orders due to unforeseen soil or utility conditions.
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