NOTE-- We retired the BidMagic construction estimating
software in 2001. It has been replaced by Goldenseal construction
estimating software.
We still include this BidMagic estimating software manual
as a convenience for users of our older program. Many features are similar, in Goldenseal estimating.
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The BidMagic construction estimating software includes
adjustors for the labor and material components of an estimating unit cost.
Using Labor and Material Adjustments
Labor and material adjustments will always start with an arithmetical operator--usually
a multiplication sign. The adjustment formulas are used to modify the 'stock' unit prices,
based on a change in construction dimensions.
Labor or material adjustments allow you to have one line item in Specifications that
can calculate prices for many different choices.
For example, the labor adjustment for some exterior wall framing items is *(extSpacing+0.5).
ExtSpacing is the number of studs per foot, while the 0.5 covers the installation cost for top and bottom
plates. If you switch from 16" on centers to 24" on centers, the labor adjustment will automatically
adjust the labor it takes to install the extra studs.
The material adjustment for the same exterior wall framing items is *averageceiling/8*(extSpacing+0.5). This adjust
the cost of materials for both ceiling heights and stud spacing.
The following construction dimensions will often
be used for Labor and Material Adjustments:
- Footing width and depth-- to adjust for the volume of concrete in
footings.
- Foundation
wall thickness -- to adjust for the volume of concrete in poured walls.
- Pier or Piling diameter-- to
adjust for the volume of concrete in piers or pilings.
- Slab thickness-- to adjust for the volume
of concrete in floor slabs.
- Stud/Joist spacing-- to adjust for the extra framing needed for closer
stud or joist spacings.
- Sheathing thickness-- to adjust for the extra cost of thicker plywood
or other sheathing materials.
- Baseboard, Door Casing and Window Casing widths-- to adjust for the
board footage needed for different sizes
of cut trim.
- Number of Paint Coats-- to adjust for the extra labor and materials
used for each additional coat of paint.
- Insulation Thickness -- to adjust for the additional material cost
of thicker insulation.
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