Divisions Tables Divisions Tables
1. GENERAL 4-2 through 4-5 9. FINISHES 4-102 through 4-117
2. SITEWORK 4-6 through 4-38 10. SPECIALTIES 4-118 through 4-120
3. CONCRETE 4-39 through 4-55 11. Architectural Equipment Not used
4. MASONRY 4-56 through 4-63 12. Furnishings Not used
5. METAL 4-64 through 4-79 13. Special Construction (ABFC ) Not used
6. CARPENTRY 4-80 through 4-93 14. Conveying System Not used
7. MOISTURE PROTECTION 4-94 through 4-98 15.MECHANICAL 4-121 through 4-136
8. DOORS, WINDOWS, GLASS 4-99 through 4-101 16.ELECTRICAL 4-137 through 4-153
17. EXPEDITIONARY STRUCTURES 4 - 154 through 4 - 155
a. How to Use the Labor Estimating Tables. The activities in the various labor estimating tables are divided into units which are always ONE not measurement commonly associated with each craft and material take-off quantities. There is only one amount of man-hours effort per unit of work. This number represents normal Seabee production under average conditions. As used here, one man-day equals eight man-hours of direct labor. Man-day figures do not include overhead items such as dental or personnel visits, transportation to and from the
No two jobs will be exactly alike and have exactly the same conditions; therefore, the estimator must exercise some judgment about the project that is being planned. The production efficiency guide and graph (table 4-1, figure 4-1) are provided to assist the estimator to weigh the many factors that contribute to varying production, and eventual completion of a project. The estimator can then translate what is known, and can predict a more accurate quantity from the average figures given on the labor estimating tables.
b. Efficiency Factor. There are three types of efficiency factors that impact on manpower resources. The definitions of these three types should assist the estimator to decide when to apply each towards the manpower availability equations.
(1) Direct Labor Efficiency factor is used to determine how much construction type production a battalion main body or detachment is achieving. It is easily determined from the Situation Report (SITREP). The overall battalion goal is 30 percent while main body averages are 20 percent.
The formula is the fraction (written as percent) of actual direct labor divided by the total strength of the battalion. It is used where actual direct labor is the total labor charged to the project tasking, and is accounted for by the timekeepers at each job site. The total strength includes every enlisted person in the battalion, both Occupational Field 13 (OF-13) and non OF-13.
(2) Production Efficiency factor is used to estimate the amount of man-days necessary to complete a specific project. The average Seabee production is 67 percent (table 4-1).
The efficiency is impacted by eight production elements (workload, site area, labor, supervision, job conditions, weather, equipment, tactical and logistical) at each job site.
(3) Availability factor (percentage) determines how much of the planned direct labor is available. Each main body and detachment side has an historical availability factor that can be used to determine how much manpower is available during a deployment. Such items as leave and liberty, battalion inspections, collateral duties, all impact on how much time the direct labor planned becomes actual. The average availability factor ranges from 60 percent to 90 percent and depends on the deployment site. Thus, the formula is: Direct Labor Planned x Availability Factor = Direct Labor Actual. This factor is used in the Man-Day Capability equation shown below.
Man-Day Capability: MC =DL x AF x WD x ME
MC = Day Capability, Day Availability or Tasked
Man-An example of the use of these factors to staff a detachment is shown below.
GIVEN: Tasking (MC) = 3,000 Man-Days
Work Days (WD) = 120 days
Man-Day Equivalent (ME) = 1.125 or 9/8 Availability Factor (AF) = .80 or 80 percent FIND: Size of Detachment necessary to achieve tasking.
SOLUTION: MC = DL x AF x WD x ME
Note: The planned direct labor is 28 Seabees. Actual direct labor equals 28 x .8 or 22.4 Seabees. This means that 22.4 Saebees will be on the job at any given time.
If the Detachment received 10 Seabees for overhead or indirect labor, such as Admin Personnel, Central Tool Room (CTR), Material Liaison Office (MLO), Construction Mechanics (CM), etc., the total strength becomes 28 + 10 = 38 Seabees. The percent of actual direct labor for the Detachment would be 22.4/38 = 58.9 or 59 percent.
This same formula can be used by the crewleader (estimator) to determine duration or crew size for a given activity by making the following substitution in the basic equation:
MC = MD (Man-Day Estimates)
Solving for Crew Size the equation becomes:
CS = MD/(DUR x AF x ME)
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DIVISION 1. GENERAL
Page A. PLANT OPERATION
Table 4-2 Asphalt Plant Operation . . . 4-11 Table 4-3 Rock Crushing Plant Operation . . . 4-11 B. GENERAL SUPPORT ITEMS
Table 4-4 Scaffolding, Runways, and Ramps . . . 4-12 Table 4-5 Temporary Construction . . . 4-12
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TABLE 4-2. Asphalt Plant Operation
Work Element Description Unit Man-Hours Per Unit
Setup and Dismantle Plant Each 120 (1155)
Operation of Asphalt Plant TN 0.08 (1156)
Haul Asphalt to Job TN / MI 0.048 (1157)
SUGGESTED CREW SIZE:
Setup and Dismantle Plant: five EOs, one CE, one SW, one CM Asphalt Plant Operation: five EOs
Hauling Asphalt to Job Site: EOs required depend on scop of job Maintenance (support): one CE, one CM, two EOs
(one plant operator, one ground man, one loader operator) NOTES: 1. Figures are based on drum mix plant, 70 ton per hour.
2. Site preparation and concrete curing time not included in table.
TABLE 4-3. Rock Crushing Plant Operation
Work Element Description Unit Man-Hours Per Unit
Setup and Dismantle Each 320 (1158)
Operate Crushing Plant CD 0.16 (1159)
Stockpile Crushed Material CD 0.0 24 (1160)
Haul Crushed Material to Job CD 0.048 (1161)
SUGGESTED CREW SIZE:
Setup and Dismantle Plant: seven EOs, one SW, one CE, one CM Operate Crushing Plant: two EOs
Stockpile Crushed Material: four EOs
Maintenance (support): one SW, one CE, one CM
NOTE: 1. The production figure is based upon 75 TPH plant operating at 50 percent of rated capacity crushing granite at 3,000 LB per cubic yard. For plants of other sizes use 50 percent of rated capacity and the size of your crew for calculations.
2. Production figures may have to be adjusted in accordance with the type of material being processed, and with other varying circumstances. For example: Coral weights (approximately 2,000 LB per loose cubic yard.
TABLE 4-4. Scaffolding, Runways, and Ramps
Work Element Description Unit Man-Hours Per Unit
Erect and Dismantle Tubular SF of Wall Surface 0.04 (1164) Scaffold (including Planks and
Leveling)
Construct Runways and Ramps SF 0.064 (1162)
Place and Remove (runways FT 0.16 (1163)
and ramps)
SUGGESTED CREW SIZE:
Scaffolding Erection: three to four BUs, increase crew size for multiple tiers.
NOTE: 1. The first tier requires more time due to leveling and alignment procedures.
TABLE 4-5. Temporary Construction
Work Element Description Unit Man-Hours Per Unit
Barricades (Wood Frame and FT (4' High) 0.64 (1165)
Plywood) Fabricate and Erect FT (8' High) 0.75 (1166)
4' High, 8' High
Rubbish chute Prefabricated 36 FT 0.5 (1167)
Inches Diameter
SUGGESTED CREW SIZE:
Two to four non-skilled
NOTE: 1. For temporary roads and fencing refer to Division 2; for temporary water service refer to Division 15; for temporary lighting and electrical service refer to Division 16.