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Estimating Excavation explains how to calculate the amount of dirt you'll have to move and the cost of owning and operating the machines you'll do it with. Detailed, step-by-step instructions on how to assign bid prices to each part of the job, including labor and equipment costs. Also, the best ways to set up an organized and logical estimating system, take off from contour maps, estimate quantities in irregular areas, and figure your overhead. 448 pp.
Estimating Excavation - Table of Contents:
Get Started Right
Why calculate quantities?
Reading plans and specifications
Accuracy is essential
Record keeping
The Site Visit
Review the plans first
Make the visit productive
Site visit for a sample project
Properties of Soils
Soil testing
Soil classifications
Soil characteristics
Area Take-off by Plan and Profile
Cut and fill sections
Understanding surveys
End area calculations
Calculating the volume
Reading Contour Maps
Planimetric and topographic maps
Understanding contour lines
Locating unmarked points
Monuments and bench marks
Area Take-off from a Topo Map
Comparing the contour lines
Estimating with a grid system
Doing the take-off
Calculating cut and fill areas
Using worksheets in a take-off
Shortcuts for calculating quantities
The equal depth contour method
Irregular Regions & Cold Areas
Finding area using compensating lines
Finding volume using total area and average depth
Using compensating lines with a coordinate system
Using the trapezoidal rule
Using Shrink & Swell Factors
Soil states and their units of measure
Using shrink/swell factors in earthwork estimates
Estimating the number of haul trips
Using material weights to customize shrink/swell factors
Using soil weights to calculate equipment load factors
Pay yards
Topsoil, Slopes & Ditches
Dealing with topsoil
Calculating net volumes for earthwork
Slopes and slope lines
Estimating trenches
Basements, Footings
Grade Beams & Piers
Estimating basement excavation quantities
Finding volume - outside basement walls
Calculating the total volume for basement excavation
Sample basement estimate
Estimating ramps
Grade beams and piers
All About Spoil and Borrow
Underlying costs of spoil and borrow
Spoil and borrow volume calculations
Calculating the volume of a stockpile
Finding the volume for a stockpile of unknown height
Calculating volume for a stockpile of set area
Balance Points, Centers of Mass & Haul Distances
Balance points to an excavation estimator
Balance points to an engineer
Reducing haul distances
Calculating -haul distances
Earthmoving Equipment: Productivity Rates and Owning & Operating Costs
Estimating Excavation
