Transcription
Mechanical Estimating ManualSheet Metal, Piping and Plumbing
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Mechanical Estimating ManualSheet Metal, Piping and PlumbingBy Wendes Systems, Inc.Edited by Joseph D’Amelio
Library of Congress Cataloging-in-Publication DataMechanical estimating manual : sheet metal, piping, and plumbing/by Wendes Systems, Inc.;edited by Joseph D’Amelio.p. cm.Includes index.ISBN 0-88173-538-8 (print) -- ISBN 0-88173-539-6 (electronic)1. Buildings--Mechanical als, etc. I. D’Amelio, Joseph . II. Wendes Systems, Inc.TH6010.M457 2006696--dc222006041262Mechanical estimating manual : sheet metal, piping, and plumbing/by Wendes Systems, Inc.; edited by JosephD’Amelio 2007 by The Fairmont Press, Inc. All rights reserved. No part of this publication may be reproducedor transmitted in any form or by any means, electronic or mechanical, including photocopy,recording, or any information storage and retrieval system, without permission in writing from thepublisher.Published by The Fairmont Press, Inc.700 Indian TrailLilburn, GA 30047tel: 770-925-9388; fax: d by Taylor & Francis Ltd.6000 Broken Sound Parkway NW, Suite 300Boca Raton, FL 33487, USAE-mail: orders@crcpress.comDistributed by Taylor & Francis Ltd.23-25 Blades CourtDeodar RoadLondon SW15 2NU, UKE-mail: uk.tandf@thomsonpublishingservices.co.ukPrinted in the United States of America10 9 8 7 6 5 4 3 2 10-88173-505-1 (The Fairmont Press, Inc.)0-8493-9210-1 (Taylor & Francis Ltd.)While every effort is made to provide dependable information, the publisher, authors, and editorscannot be held responsible for any errors or omissions.iv
Quick ReferenceSection I—HOW TO PREPARE SHEET METAL AND PIPING ESTIMATES1 Wendes Guide to Successful Estimating; Principles2 Systematic and Efficient Estimating Procedures3 Sample HVAC Estimate and FormsSection II—BUDGET ESTIMATING4 Budget EstimatingSection III—EQUIPMENT ESTIMATING5 Heating and Cooling Equipment6 HVAC Units and Air Distribution Equipment7 Plumbing Fixtures and Specialties8 Air Pollution and Heat Recovery EquipmentSection IV —SHEET METAL ESTIMATING9 Sheet Metal Estimating Basics10 Rectangular Galvanized Ductwork11 Spiral and Light Gauge Round Ductwork.12 Fiber Glass Ductwork13 Heavy Gauge Ductwork.14 Sheet Metal Specialties and Acoustical Lining15 Miscellaneous Labor OperationsSection V—PIPING ESTIMATING16 Piping Estimating Basics17 Pressure Pipe and Fittings18 Valves and Specialties19 DNVV Pipe and FittingsSection VI—CONTRACTING FOR PROFIT20 Markups for Overhead and Profit21 Contracting for profit22 Computerized Estimatingv
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ContentsPreface . xiSection I—HOW TO PREPARE SHEET METAL AND PIPING ESTIMATESChapter1 Successful Estimating Principles . 3Crux of Successful Contracting . 3Primary Goals of Contracting and Bidding . 3Problems and Causes of Poor Estimating. 3Estimating Competence Required . 4The Eight Facets of the Estimating Diamond . 4Performance Standards for Complete and Accurate Estimates . 5Fundamental Bidding Rules . 5How to Estimate Labor Accurately and Realistically . 8Do Your Homework. 9Use Time Saving Estimating Techniques . 9Apply Valid Overhead and Profit Markups . 102 Systematic, Efficient, Accurate Estimating Procedures .11Steps in the Estimating Procedure .11Checking Estimates . 12Scope of Complete Sheet Metal Estimate, Check-off List . 16Heating Equipment Check-off List . 17Cooling Equipment Check-off List . 18End of Bid Factors Check-off List . 18Remodeling Work Check-off List. 1915 Bastards with No Regular Homes . 203 Sample HVAC Estimate and Forms . 23Overview of Sample Job. 23Purpose of Forms . 23Specifications on Sample Job . 24IBM Office Drawing. 25Sample Filled Out Estimating Forms . 26Calculating Labor Costs Per Hour. 31Section II —BUDGET ESTIMATINGChapter4 Budget Estimating. 37Budget Estimates . 37Semi-Detailed Scope Budget Estimates . 37Detailed Estimates . 38Budget Estimating HVAC Costs and Engineering Loads . 38Budget Estimating Galvanized Ductwork . 39Section III —EQUIPMENT ESTIMATINGChapter5 Heating and Cooling Equipment . 59Chilled and Hot Water Pumps . 60vii
Hot Water Reheat Coils . 61Electric Duct Heaters . 62Duct Heaters . 63Unit Heaters . 63Gas Fired Cast Iron Boilers . 64Baseboard Heating . 65Infra Red Units . 66Electric Baseboard Heating . 66Wall Heaters . 67DX Evaporator Coils . 68Chilled Water Coils . 69Centrifugal Water Cooled Chillers . 70Reciprocating Chillers . 71Cooling Towers. 73Heat Pumps . 74Condensing Units . 756 HVAC Units and Air Distribution Equipment . 77Rooftop Units . 78Air Handling Units . 80Self Contained Air Conditioning Units. 83Dampers . 87Louvers . 89Estimating Registers . 90Ceiling Diffusers. 91VAV Terminal Units, Components etc. . 92Filter Labor . 967 Plumbing Fixtures and Specialties . 978 Air Pollution and Heat Recovery Equipment. 101Air pollution equipment . 101Section IV— SHEET METAL ESTIMATINGChapter9 Sheet Metal Estimating Basics. 109Requirements of a Proficient Sheet Metal Estimator . 109Types of Ductwork .111Procedure for Taking Off Ductwork .112Types of Ductwork Connections .113Methods of Figuring Ductwork Weight.114Methods of Calculating Ductwork Labor .115Material Data . 124Correction Factors . 12510 Galvanized Ductwork . 129Estimating Galvanized Ductwork by the Piece . 129Estimating Galvanized Ductwork by the Pound . 136Medium and High Pressure Ductwork . 142Automatic Duct Coil Line Fabrication . 143viii
11 Spiral and Light Gauge Round Ductwork . 145Round Duct Gauge Data . 146Furnace Pipe Flexib
labor and cost fi gures, it thoroughly covers the entire realm of mechanical contracting estimating. Based on Twenty Years of Cost Records and Time Studies The sheet metal labor fi gures contained herein span over twenty years of cost records, labor histories and time studies, not only from the contracting company
