However, in order to fully understand and appreciated the potential problems in the measurement process a thorough knowledge of measurement conventions is essential. When taking off quantities, break each item down by size, type of material, and workmanship. Substructure work is typically the first class of work to be explained in textbooks dealing with both construction technology and. Today, the majority of bills of quantities are produced using proprietary software packages, each system having its own format for inputting dimensions and formulating descriptions. Taking off construction works the term taking off refers to the process of identifying elements of construction works that can be measured and priced.
A superstructure is an upward extension of an existing structure above a baseline called ground level in general and it usually serves the purpose of the structures intended use. These measurements are used to format a bid on the scope of construction. The term taking off refers to the process of identifying elements of construction works that can be measured and priced. The taking off process can be done manually by hand or using specialized software. Jan 25, 2016 1 an introduction to taking off building quantities an irish approach tony cunningham school of surveying and construction management dublin institute of technology. The arrow mark on the green layer shows how the length of a long wall should be measured out. Get this 224page book on amazon this book will give you a walkthrough of the estimating quantity takeoff process for a complete building plan. The materials that are taken off which make up these elements are the rebar, formwork, concrete material, and finishing area. The most likely questions that you will see during the exam are quantity take off for. Civil engineering spons price books bryan spain on. Approximate quantities, composite rate, composite rate build up, elemental estimate, elemental rate, elemental rate build up, internal divisions, internal walls, superstructure. In the first portion of this chapter six common types of bridge decks are dealt with, each having particular features which need to be considered and monitored.
Taking off measuring of quantities in which the dimensions are scaled or read from drawings and entered in a recognized form or specially ruled paper, called dimension paper. Learn construction estimating in 24 hours bills of quantities, illustrated takeoff of drawings for detached garage. We are going to illustrate a composite rate buildup for internal walls. Spacers quantity takeoff rules for estimating the quantitties of spacers and rebar chairs superstructure and foundation beams. Accurate quantities have to be measured from the fully completed design in the precontract stage. Taking off construction works designing buildings wiki. Jun, 2019 taking off construction works designing buildings wiki share your construction industry knowledge. Composite rate build up internal walls superstructure the elemental estimate layout and grouping of items will be used in this example. In the given below diagram, the green coloured layers are long walls and other layers represent the short walls. The issue is i studied a hnc in construction and jumped onto the 2nd year of the degree never doing a take off before and this needs to be.
This work is licensed under a creative commons attribution noncommercialshare alike 3. Feb 21, 2018 taking off measuring of quantities in which the dimensions are scaled or read from drawings and entered in a recognized form or specially ruled paper, called dimension paper. Start the quantities takeoff for the category of construction work selected to be done in house most often site work, foundations, and concrete work. Taking off measuring of quantities in which the dimensions are scaled or. Waste, drop and lost factors should be determined by field experience, fabrication methods, and the detail level of the documents being taken off.
Submit all taking off sheets hand written as an appendix to the bq. Material take off week 3 cee4333 agenda earthwork excavation concrete foundation wall excavation site excavator loader 118 horsepower 710g, 22. Walls superstructure approximate quantities in elemental estimate layout. Section 3 special factors to consider that may affect take off and pricing small quantities vs. Example taking off for substructure measurement conventions. This term is applied to various kinds of physical structures such as buildings, bridges, or ships. Download excel sheet for civil work quantities welcome back in worlds no. Today, the majority of bills of quantities are produced using proprietary software packages, each system having its own format for inputting dimensions and. A quantity surveyor may take off quantities from detail drawings to produce a bill of quantities for tendering purposes. What is the proper difference between in superstructure and. Material takeoff michigan technological university. Wall finishes youtube center line method quantity of materials with centre line method. Substructure work is typically the first class of work to be explained in.
This is a technical process relevant to builders and contractors and is the technique of measuring quantities of materials and labour from drawings, sketches and specifications prepared by designers, principally architects and engineers. Take off the quantities for the substructure to damp proof course level. How to estimate the cost of highrise cast in place. Takingoff list preliminaries substructure superstructure external walls roof flooring finishes windows and doors. Column c is the squaring column where the result of the addition, subtraction or multiplication of the entries in the dimension column is recorded. Produce a manual detailed takeoff for the project in.
To find the length of excavation be careful to fully understand what the given dimension are measuring. Aug 27, 2017 taking off quantities for top soil duration. Take off quantities concrete is taken off by the four elements that make up the structure. During the contract period, measurement is required for provisional quantities and valuation of variations only see section 10 of pah chapter 5. Figures which are to be added or subtracted are bracketed together in the manner shown. It includes a variety of trades such as clearing site, top soil removing, excavation, concrete work and masonry works. It must be as accurate as possible and should be based on all available engineering and design data. Taking off measurements and estimating the project quantities are timeconsuming, but it is required to be done. June 22, 2018 in english, estimating and tendering, quantity surveying, taking off measurement. The word superstructure is a combination of the latin prefix, super, meaning. Quantity takeoffs qto are a detailed measurement of materials and labor needed to complete a construction project.
Learn construction estimating in 24 hours bills of. The quantities for the works form the basis of the contract sum and are not subject to remeasurement. Spacers quantity take off rules for estimating the quantitties of spacers and rebar chairs superstructure and foundation beams. Here is a list of substructure taking off according to smm7.
The rules have been written to provide a standard set of measurement rules that are understandable by. When building up composite rates for approximate quantities, you have to follow. Taking off processes and preparation of an unpriced bill of. The bill of quantities boq is defined as a list of brief descriptions and. Quantity takeoff roofing roof material quantity takeoff are pretty easy trig problems, but i will go over it quick to make sure you get it, because most likely a question will be on the pe exam. You are a contractor that has been given a set of construction documents, and have been asked to quantify. What is substructure and superstructure in building. The constructional deviation does not affect the support rebars 1 and 2, which will be formed with a total length equal to 1. The constructions after the foundations are of the superstructure. Chapter 12 quantities, costs, and specifications 12.
Taking off measurement is called the process of recording dimensions in a standard way which is accepted by construction professionals. This is necessary to produce bills of quantities and requires that the design is complete and a specification has been prepared. I need a takeoff of quantities in accordance with nrm2. Principles of taking off quantities in taking off sheet t. When thinking of roof problems you just need to worry about three things. Construction professionals are involved in procuring building work on a daily basis.
These materials use the following take off units in an estimate. This book provides a thorough understanding of the general principles of measurement for taking off quantities. Example taking off for substructure measurement conventions isurv. Dec 23, 2012 wall plate is the timberwood that are placed on top of blocks or roof beams as the case may apply, so for the fastest way to calculate this, is to add the entire walls length and divide by 3. The dimensions should always be recorded in the order of length, width and height.
Besides the estimator can compare prices per sq ft for different roofing materials. Dec 12, 2015 first you have to build a very precise model. Use of appropriate automation tools is highly recommended. What marine recruits go through in boot camp earning the title making marines on parris island duration. Material takeoff week 3 cee4333 agenda earthwork excavation concrete foundation wall excavation site excavator loader 118 horsepower 710g, 22. Building quantities take off for foundations, frames and finishes 3. When building up composite rates for approximate quantities, you have to follow some basic principles. Jun 24, 2019 task 1 bart a use the sheets to complete the work should be hand written not all the work some of it takingoff list manual taking off nrm2 codes assumptions queries waste calculation. The quantities taken off are called neat quantities. Structural steel takeoff example quantity takeoff and. Experienced estimators have developed procedures to help them quantify their work.
Make necessary assumptions where there is not enough information and. Composite rate build up external walls superstructure the elemental estimate layout and grouping of items will be used in this example. This process includes breaking the project down into smaller and more. Also list the type of construction equipment needed for each phase. Taking off brick work blockwork forming cavity cavity insulation damp proof course cavity closure external opening stairs.
Prepare a bill of quantities strictly in accordance with asmm5 for the substructure and superstructure of qshouse as per drawings and specifications provided. An essential guide to any quantity surveyor, architect or engineer taking off quantities. They are developed by an estimator during the preconstruction phase. Superstructure the superstructure is the portion of a building which is constructed above the ground level and it serves the purpose of structures intended use. How to take off construction works designing buildings wiki. Learn how to take off quantities for a proposed residential house or any type of dwelling, starting with excavations from the foundations to the roof, including external works site. Methods of takeoff quantities explanation with solved problem. Volume 1 of this book will give you a walkthrough of the estimating quantity takeoff process for a complete building plan from foundations to superstructure. Substructure takingoff involves all measurement work up to and including the dampproof course. The scope of this work is limited to the processes that are involved in taking off and preparing an unpriced bill of quantities for building work but excluding the abstracting, unpriced bill of quantities and service for super structural work. This advanced software is for professional estimators and it allows you to prepare detailed bills of quantities, cost plans estimates, valuations and the final account. Qs plus estimating software for quantity surveyors and. Taking off processes and preparation of an unpriced bill.
Substructure taking off involves all measurement work up to and including the dampproof course. The quantification process involves recording dimensions and is referred to as. How to take off construction works designing buildings wiki share your construction industry knowledge. These elements are columns, walls, beams, and decks. Taking off substructure from cutting down trees to topsoil excavation.
Instructor, department of civil engineering and engineering mechanics, columbia university. Taking off quantities is a key skill demanded of a quantity surveyor. Hassanain 6 11 quantity takeoff measuring quantities also if the project being estimated is similar to a past project, these forms can be set up with all the. Chapter 2 quantity takeoff the quantity takeoff is an important part of the cost estimate. Quantity take off roofing roof material quantity take off are pretty easy trig problems, but i will go over it quick to make sure you get it, because most likely a question will be on the pe exam.
Traditional taking off uses dimension paper which is made of a series of columns. May 06, 2018 to prepare an unpriced bill of quantities for substructure work only. This process is also called taking off and probably sounds a lot more interesting than it really is. A neat quantity is a quantity that has no waste, drop, or lost quantities factored into them. Sep 12, 2015 taking off measurement is called the process of recording dimensions in a standard way which is accepted by construction professionals. Detailed bill of quantities for the construction of the house in accordance with nrm2 include a preliminary bill maximum8 priced items to be considered. Quantities refers to the estimated amounts of labour and materials required in the execution of the various items of the work and together these items give the total requirements of the building contract.
Services roof and ceiling take off sheets in a roof estimating sheet the estimator will get the roofing costs and calculate the estimate of total roof work. The use of preprinted forms is a common tool used to help coordinate the take off process, especially if more than one person is involved. Civil engineering demonstrates, through a series of detailed worked examples from a range of civil engineering projects, how the measurement techniques are actually used. How to estimate the cost of a steel superstructure for a. How to calculate timber roof members building contractor. Large quantities this concept applies to most all trades and is not unique to structural steel, however smaller projects with less tonnage will tend to cost higher than a larger project with significantly larger quantities. Quantities refers to the estimated amounts of labour and materials required in the execution of the various items of the work and together these items. It includes columns, beams, slab upwards including all finishes, door and window schedules, flooring, roofing, lintels, and parapets. Oct 02, 2017 finally multiply them to find out the necessary quantity, long wall outtoout or short wall intoin x breadth of wall x height. Hello everyone, here are the some principles in taking off quantities of construction field.