Estimating Excavation Revised - Craftsman Book Company

Buy this complete title here:

ESTIMATING EXCAVATION REVISPEreDview By Deryl Burch

Online Revised by Dan Atcheson

?

Craftsman Book Company 6058 Corte del Cedro / Carlsbad, CA 92011

Buy similar Craftsman Book Co. titles here:

Buy this complete title here:

ACKNOWLEDGMENTS

The author wishes to express his appreciation to: Gregg Lapore and Trackware, for help with Chapter 16.

Preview Looking for other construction reference manuals? e Craftsman has the books to fill your needs. Call toll-free 1-800-829-8123

lin or write to Craftsman Book Company, Carlsbad, CA 92011 for

a FREE CATALOG of over 100 books, including how-to manuals, annual cost books, and estimating software.

OnVisit our Website: craftsman-

First edition ?1997 Craftsman Book Company Second edition ?2013 Craftsman Book Company

Buy similar Craftsman Book Co. titles here:

Buy this complete title here:

Contents

1 6 Get Started Right.............................. 5

Roadwork Take-Offs.................... 125

Why Calculate Quantities.......................... 6

Plan and Profile Method........................ 125

Reading Plans and Specifications.............. 8 Accuracy Is Essential............................... 12

w Record Keeping......................................... 16 ie Understanding Plan

or Drawing Measurements.................... 18

v What If You Don't Have Plans................. 20 2 e The Site Visit.................................... 21 7r Review the Plans First............................. 21 P Make the Visit Productive....................... 22

Site Visit for a Sample Project................. 32

e Site Visit Checklist................................... 35

Don't Forget Overhead............................ 35

3 lin Properties of Soils.......................... 43 n Soil Classifications.................................... 43

Pre-Construction Field Testing............... 46

O Soil Testing in the Lab............................. 50

Understanding Surveys......................... 127 Plan and Profile Cross Section Sheets............................ 128 Cross Section Method............................. 132 Calculating the Scale Factor.................. 139 Mass Diagrams....................................... 143

Irregular Regions & Odd Areas....................................... 151

Finding Area Using Compensating Lines............................. 153

Finding Volume Using Total Area and Average Depth...................... 154

Finding Volume Using Compensating Lines with a Coordinate System............................... 159

Finding Volume Using the

Compaction Fundamentals...................... 55 Trapezoidal Rule................................... 167

4 Reading Contour Maps.................. 65

Planimetric and Topographic Maps........ 65 Understanding Contour Lines................. 68 Benchmarks and Monuments.................. 73

5 Area Take-Off

from a Topo Map............................ 75

Comparing the Contour Lines................. 75 Estimating with a Grid System............... 78 Calculating Cut and Fill Areas................ 90 Using Worksheets in a Take-Off............ 102 Shortcuts for Calculating Quantities.... 109

8 Using Shrink &

Swell Factors................................. 177

Soil States and Their Units of Measure.................................. 177

Using Shrink/Swell Factors in Earthwork Estimates....................... 178

Ground Loss........................................... 181

Estimating the Number of Haul Trips............................................. 182

Material Weight Factors......................... 183

Pay Yards................................................ 185

Buy similar Craftsman Book Co. titles here:

Buy this complete title here:

9 Topsoil, Slopes & Ditches......... 187

Dealing with Topsoil.............................. 187

Calculating Net Volumes for Earthwork....................................... 193

13 Earthmoving Equipment:

Productivity Rates and Owning & Operating Costs....... 281

Machine Power....................................... 282

Slopes and Slope Lines........................... 197

Machine Speed........................................ 287

Estimating Trenches.............................. 202

Machine Production............................... 293

Drainage Channels................................. 202

Productivity Calculations

for a Simple Dirt Job............................ 296

Utility Trenches..................................... 205

10 Basements, Footings,

Grade Beams & Piers................ 211

w Estimating Basement ie Excavation Quantities.......................... 211

Finding Volume -- Outside

14 v Basement Walls..................................... 213 e Calculating the Total Volume r for Basement Excavation..................... 222

Sample Basement Estimate................... 228

15P Sheet Piling............................................ 238

Estimating Ramps.................................. 239

e Grade Beams and Piers.......................... 244 11 lin All About Spoil & Borrow......... 249

Underlying Costs of

n Spoil and Borrow.................................. 250 16 Spoil and Borrow Volume

O Calculations.......................................... 251

Equipment Production Rates................ 302 Owning and Operating Costs................. 309 Calculating the Overhead...................... 313 Adding the Profit.................................... 316 Bid Price per Cubic Yard........................ 316

A Sample Take-off........................ 317

General Specifications............................ 318 Doing the Take-off.................................. 320

Costs & Final Bid for the Sample Estimate ................ 415

The Bid Preparation Process................. 416 Overhead................................................. 420 Machine Selection.................................. 420

Computers & Computer Estimating Programs.................. 515

Calculating the Volume of a Stockpile......................................... 253

Computers and Earthwork Programs............................................... 515

Finding the Volume of a Stockpile of Unknown Height.............. 256

Taking off an Earthwork Project................................ 517

Calculating Volume for a Stockpile of Set Area............................ 261

Working with Plans on Separate Sheets.................................... 533

Importing CAD Drawings...................... 533

12 Balance Points, Centers of

Additional Programs.............................. 535

Mass & Haul Distances............. 265

Solving Complex Earthwork

Balance Points to an

Problems with Software....................... 537

Excavation Estimator........................... 265

In Conclusion.......................................... 539

Balance Points to an Engineer.............. 266 Index........................................................... 541

Reducing Haul Distances....................... 267

Calculating Haul Distances................... 270

Buy similar Craftsman Book Co. titles here:

Buy this complete title here:

1

C Get StartedeRvigiehwt onstruction cost estimating is demanding work, no matter what type of construcr tion is involved. But I think estimating earthwork is the hardest of all. Why? For two

reasons: First, excavation has more variables and unknowns -- you don't know what's

P down there until you start digging; second, you have to rely on information from many

sources -- some of which may not be accurate.

e That's why every earthwork estimator needs special skills: lin PP The ability to read plans and specifications n PP An understanding of surveying and engineering practice O PP A facility with mathematical calculations

PP The ability to anticipate environmental and legal issues PP An abundance of good common sense If you can bring common sense to the task, this manual will show you how to do the rest. I'll help you develop all the skills every good earthwork estimator needs. Of course, I can't cover everything on every type of job. But I'll include the information most earthwork estimators need on most jobs. Occasionally, you'll have a job that requires special consideration. But if you understand the principles I'll explain here, you should be able to handle anything but the most bizarre situations. A couple of subjects I think are important to cover here are the "by hand" approach to many earthwork problems, as well as the basics of computer earthwork estimating software. Both are meaningful topics for the earthwork estimator today. I've met many younger estimators who do earthwork take-offs with a computer who can't even

Buy similar Craftsman Book Co. titles here:

 ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download