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).Continue Reading