Material Costs.
From schematic drawings, estimated quantities of
materials, and from approved design drawings, actual take-off quanti-
ties of materials were established for the particular item of construction involved. The estimated or actual quantities determined for each
feature of the contract were increased in accordance with normal estimating practice to cover lap and waste in actual construction.
However, because of the location of this Project, involving an
abnormal shipping problem, material quantities estimated in accordance with normal practice were increased in the amount of 15 per cent
to cover loss, waste, breakage, and other similar unpredictable items,
After arriving at the estimated quantities of materials needed
for any feature of the Contract in accordance with the above procedure, the unit cost was applied from quotations and catalog prices
supplied by the manufacturers or vendors. In the majority of instances
this quotation was FOB the Oakland Naval Supply Center.
Labor Costs. Cost estimates for direct labor included the labor
directly chargeable to specific items of work plus the cost of handling materials at the Jobsite from a central warehouse to the specific
location of any structure or facility. The labor rates applied to the
various classes of construction labor were the rates effective within
the Building and Construction Trades Council, American Federation of
Labor, as applied in both the Los Angeles and San Francisco areas,
EquipmentCosts.
Equipment costs were determined from a detailed
estimate of the equipment necessary to complete the construction of
each work feature, and the costs supplied were based on the estimated
time the equipment would be in operation on each work feature. In
the absence of specific information as to the type and amount of construction equipment that would be purchased new or be supplied in
various states of repair by Government agencies, the equipment costs
on all cost estimates reflect an equipment rental rate which was
established on a cost per day basis from "Average Owners Expense
Schedules" of the Associated General Contractors of America, Inc.,
combined with equipment rental rates established by Maximum Price
Regulation No. {34,, which included the items of amortization, normal
maintenance and repair, fuel and lubricants.
In addition to the equipment costs that were established in this
manner, there was added a factor of 50 per cent to cover the vari-
ables of climatic and Jobsite conditions that were known to exist
in the humid climate and sea-level location of the construction proj-
ect.
Therefore equipment costs as they have appeared in all Contract
No, AT-(29-1)-507 cost estimates might be more accurately described
as equipment rental.
All cost estimates were submitted in a form that would reflect
a provisional deduction to be made should any appreciable amount of
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