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INSTALLATION COSTS BY DEGREES OF DIFFICULTY
F-1 This installation cost represents the easiest work for the contractor in the specific trade under consideration. All conditions are normal, with the lowest combination of difficulty. The installation of tenant finishes in large area or open space of a new building is a good example of the application of F-1.
F-2 This installation cost represents a remodeling situation that is more difficult than F-1. It generally represents a productivity factor of 2/3 of F1. It may include architectural inspection, smaller quantities, or a slightly faster schedule.
F-3 This installation cost represents a productivity factor of 1/2 of F-1. Typical situations are those that are under public control, are less than common type of construction, involve very small quantities, are in a remote location or have difficult access. An example is the repair of a fire loss with full burn-out of small rooms.
F-4 This installation cost represents the most difficult situation for a contractor. These situations include a unique or historical replacement, very small quantities, in an isolated section of a building, in a secure area and productivity will be only 1/3 of normal. The conditions could occur under dual gate conditions constructed on a fast-track basis.
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