For ceiling heights greater than 20 feet, an additional allowance must be made for scaffolding. Remember to include lift rental charges in your estimate. Keep in mind that today s standard of factoring is based on motorized man lifts for over 20 feet. If you are using rolling staging, an allowance for a ground man to supply materials and push the staging may be required. Consideration should be given to the number of staging setups that will be in close proximity to each other.
Weight is always an important factor in labor units.
Estimators should obtain weight data on special equipment. Time studies for installations on hours per pound are not consistent. The estimator should develop criteria using job experience data for specific equipment. Equipment manufactures are a good source for labor requirements on special equipment. An Occupancy adjustment factor should be considered to compensate for the excess labor required when working in occupied areas.