Elevator
CSI Division 14, Conveying Equipment
A mechanized car system that moves people or freight vertically between floors, installed by a specialized, licensed elevator contractor working under its own dedicated code, in most states based on the ASME A17.1 Safety Code for Elevators and Escalators, separate from the general building code.
Why it matters
Elevator installation and inspection follow their own regulatory track, often with a state or local elevator inspector separate from the general building inspector, and the elevator shaft has to be built to precise structural and dimensional tolerances well before the elevator contractor's equipment even arrives, since a shaft built out of tolerance can be extremely costly to correct after the fact.
On a real project
A general contractor builds an elevator shaft to the precise dimensions and tolerances the elevator manufacturer requires, coordinating the schedule so the specialized elevator contractor can begin installing rails, cab, and equipment as soon as the shaft is structurally complete.
Who this matters most to
A Project Engineer coordinates the elevator contractor's long lead time and shaft tolerance requirements well in advance, since elevators are typically ordered and engineered months before installation begins. A Facilities Manager manages the elevator's required ongoing inspections and maintenance long after construction, since elevators are subject to recurring code-mandated testing throughout a building's life.
Where this goes wrong
A general contractor builds an elevator shaft slightly out of the tolerance the elevator manufacturer specified, not realizing the shaft's plumbness had to be more precise than typical structural tolerances. The elevator contractor can't install the guide rails correctly until the shaft is corrected, creating a costly, schedule-damaging delay right before the project's planned completion.