Construction Supervisor: Session 8

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Construction SupervisorSession 8
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Costs Associated with Project Completion

• Labor
• Materials
• Equipment
• Safety
• Quality

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Conceptual Estimate
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Detailed EstimateConstruction Systems

• Site Work
• Excavation and Foundations
• Structure
• Enclosure
• Roof
• Interior Construction
• Equipment and Furnishings
• Conveying Systems
• Mechanical Systems
• Electrical Systems

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Construction System Details

• Excavation
• Dig the hole
• Stockpile fill
• Backfill
• Foundations
• Footings
• Walls
• Columns

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Standard Units of Measure

• Cubic yards (CY)used for concrete and soil
  materials calculated by Length X Width X Depth
  divided by 27.
• Square feet (SF)used for area calculated by
  Length X Width.
• Contact area (SFCA)concrete form work
  calculated by Length X Height X 2 sides.
• Lineal feet (LF)measured length of material
  calculated by measured total length of materials
  needed.
• Ton (ton)rock, spoil material 2,000 lbs per ton
• Ton (ton)Reinforcing steel 4 .668 lbs per
  LF5 1.043 lbs per LF, 6 1.502 lbs per LF.

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Subcontractors Estimates

• Be sure all work is covered
• Check to see that there are no exclusions
• Double-check for duplication
• Last-minute bids
• Lowest bid vs. best bid
• Combined bids

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Problems with Estimates

• Inaccurate materials
• Inaccurate production and labor costs
• Gaps in subcontracts
• Non-qualified subcontractors

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Other Labor Cost Items

• FICA (Social Security)
• Unemployment Tax (both federal and state)
• Workers Compensation Insurance premiums
• Fringe benefits provided to employees health
  insurance, retirement, paid holidays and
  vacation, others
• Other insurance, such as general liability
• Miscellaneous payroll taxes that may be levied by
  the state or local government

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Labor Cost Variances

• Environmental Conditions
• Weather
• Housekeeping
• Other?

• Crew Performance
• Composition of the crew
• Crew Compatibility
• Ineffective supervision
• Other?

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Causes of Material Variances

• Late delivery
• Supplier delay
• Defective products

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Also Include

• General costs
• Items specifically mentioned in General
  Conditions document
• Jobsite overhead
• Office/storage space
• Utilities
• Project personnel
• Main Office Overhead
• Offices/storage
• Utilities
• Office personnel
• Profit