Mechanical Estimating Manual Sheet Metal Piping & Plumbing

Contents
Preface xi
Section I—HOW TO PREPARE SHEET METAL AND PIPING ESTIMATES
Chapter

1 Successful Estimating Principles 3
Crux of Successful Contracting 3
Primary Goals of Contracting and Bidding 3
Problems and Causes of Poor Estimating 3
Estimating Competence Required 4
The Eight Facets of the Estimating Diamond 4
Performance Standards for Complete and Accurate Estimates 5
Fundamental Bidding Rules 5
How to Estimate Labor Accurately and Realistically 8
Do Your Homework 9
Use Time Saving Estimating Techniques 9
Apply Valid Overhead and Profi t Markups 10

2 Systematic, Effi cient, Accurate Estimating Procedures 11
Steps in the Estimating Procedure 11
Checking Estimates 12
Scope of Complete Sheet Metal Estimate, Check-off List 16
Heating Equipment Check-off List 17
Cooling Equipment Check-off List 18
End of Bid Factors Check-off List 18
Remodeling Work Check-off List 19
15 Bastards with No Regular Homes 20

3 Sample HVAC Estimate and Forms 23
Overview of Sample Job 23
Purpose of Forms 23
Specifi cations on Sample Job 24
IBM Offi ce Drawing 25
Sample Filled Out Estimating Forms 26
Calculating Labor Costs Per Hour 31

Section II —BUDGET ESTIMATING
Chapter
4 Budget Estimating 37
Budget Estimates 37
Semi-Detailed Scope Budget Estimates 37
Detailed Estimates 38
Budget Estimating HVAC Costs and Engineering Loads 38
Budget Estimating Galvanized Ductwork 39

Section III —EQUIPMENT ESTIMATING
Chapter
5 Heating and Cooling Equipment 59
Chilled and Hot Water Pumps 60
Hot Water Reheat Coils 61
Electric Duct Heaters 62
Duct Heaters 63
Unit Heaters 63
Gas Fired Cast Iron Boilers 64
Baseboard Heating 65
Infra Red Units 66
Electric Baseboard Heating 66
Wall Heaters 67
DX Evaporator Coils 68
Chilled Water Coils 69
Centrifugal Water Cooled Chillers 70
Reciprocating Chillers 71
Cooling Towers 73
Heat Pumps 74
Condensing Units 75

6 HVAC Units and Air Distribution Equipment 77
Rooftop Units 78
Air Handling Units 80
Self Contained Air Conditioning Units 83
Dampers 87
Louvers 89
Estimating Registers 90
Ceiling Diffusers 91
VAV Terminal Units, Components etc 92
Filter Labor 96

7 Plumbing Fixtures and Specialties 97

8 Air Pollution and Heat Recovery Equipment 101
Air pollution equipment 101

Section IV— SHEET METAL ESTIMATING
9 Sheet Metal Estimating Basics 109
Requirements of a Profi cient Sheet Metal Estimator 109
Types of Ductwork 111
Procedure for Taking Off Ductwork 112
Types of Ductwork Connections 113
Methods of Figuring Ductwork Weight 114
Methods of Calculating Ductwork Labor 115
Material Data 124
Correction Factors 125

10 Galvanized Ductwork 129
Estimating Galvanized Ductwork by the Piece 129
Estimating Galvanized Ductwork by the Pound 136
Medium and High Pressure Ductwork 142
Automatic Duct Coil Line Fabrication 143

11 Spiral and Light Gauge Round Ductwork 145
Round Duct Gauge Data 146
Furnace Pipe Flexible Tubing and Flues 146
Spiral Pipe and Fittings 147

12 Estimating Fiberglass Ductwork 155
Introduction 155
Fiberglass Ductwork Construction 156
Pricing Sheet Metal Components 158
Estimate Summary and Extension Sheet 158

13 Heavy Gauge Ductwork 159
Types of Industrial Exhaust Ductwork 159
Rectangular Black Iron 159
Round Black Iron Ductwork 166
Rolled Steel Angle Rings 171
Example of Round Black Iron 172
Aluminum 173
Stainless Steel 175
FRP Ductwork 177
FRP Coated Galvanized Ductwork 179
Labor Multipliers for Heavy Gauge Ductwork 180
Air Pollution Estimating 180

14 Sheet Metal Specialties and Acoustical Lining 187
Access Doors, Belt Guards, Drain Pans 187
Flexible Connections, Hoods, Stands and Platforms 188
Roof Hoods 189
Turning Vanes 190
Splitter Dampers 191
Sheet Metal Housings 192
Acoustic Lining 192

15 Miscellaneous Labor Operations 195
Drafting and Sketching Labor 195
Field Measuring and Sketching Labor 196
Estimating Air Testing and Balancing 196
Estimating Ductwork Leak Testing 199

Section V —PIPING ESTIMATING
Chapter
16 Piping Estimating Basics 203
Requirements of a Profi cient Piping Estimator 203
Sample Estimate 207
17 Pressure Pipe, Fittings and Insulation 217
Pressure Piping and Fittings Tables for
Threaded, Welded, Flanged, Grooved and Associated Labor 218
Copper Tubing, L, K, K Labor and Pricing etc. 236

18 Valves and Specialties 253
Bronze #125, #150 Valves 254
Iron #125, #150 Valves 256
Specialty Valves 260
19 DWV Pipe and Fittings 271
Copper Tubing, DWV 272
PVC DWV Schedule 40 274
ABS DWV 278
Cast Iron Hub and Spigot DWV 280

Section VI—CONTRACTING FOR PROFIT
Chapter
20 Markups for Overhead and Profi t 287
Understanding and Applying Correct Overhead and Profi t Factors 287

21 Contracting for Profi t 295
What Determines Your Profi tability 295
How to Legitimately Reduce Costs on a Bid 296
Star Method of Reducing Ductwork and Piping Costs 297

22 Computerized Estimating 305


Total 318 pages 5.3 mb
Download