Bill of Material.
Figures 9-3 and 9-4 become the
material estimate for the project.
Equipment estimates are used with production
schedules to determine the construction equipment
requirements and constraints for Seabee deployment.
Of these constraints, the movement of material over
roadways is frequently miscalculated. In the past,
estimators used the posted speed limit as an average
rate for moving material.
This was wrong.
Equipment speed usually averages between 40 to 56
percent of the posted speed limit. Factors, such as the
road conditions, the number of intersections, the
amount of traffic, and the hauling distances, vary the
percentage of the posted speed limit. You should
consider the types of material hauled; damp sand or
loam, for example, is much easier to handle than clay.
Safety (machine limitations), operator experience,
condition of the equipment, work hours, and the local
climate are other factors.
Equipment production must be determined so that
the amount and type of equipment can be selected.
Equipment production rates are available in the
Figure 9-5.-Sample equipment estimate (sheet 1 of 2).