How to calculate steel quantity for slab, footing, column. The reminder of the power station comprising heavy foundation of piling. Material take off week 3 cee4333 agenda earthwork excavation concrete foundation wall excavation site excavator loader 118 horsepower 710g, 22. The term taking off refers to the process of identifying elements of construction works that can be measured and priced. Measurement of excavation and foundations springerlink. The building that will be used to calculate the quantities and cost estimation is shown at the figure on the right. This is necessary to produce bills of quantities and requires that the. Material takeoff week 3 cee4333 agenda earthwork excavation concrete foundation wall excavation site excavator loader 118 horsepower 710g, 22. If your main tasks are paving, a pump and fill project may not be the best use of your available knowledge, experience and skill. Estimating excavation revised craftsman book company. We provide services for design build projects, commercial construction, residential home construction with detailed quantity takeoffs and pricing from a construction projects conception phase to. I separate my forms every 4 feet by height for pricing and i use one price for material and labor for walls up to. It consists of a ground floor and a basement with one shear wall while its foundation consists of spread footings tied by connecting beams as well as one strip foundation.
Bills of quantities is created with the procedure of taking off which entails recognizing elements of construction works to be estimated and priced. Start the quantities takeoff for the category of construction work selected to be done in house most often site work, foundations, and concrete work. Use of appropriate automation tools is highly recommended. The quantities for the works form the basis of the contract sum and are not subject to remeasurement. However, in order to fully understand and appreciated the potential problems in the measurement process a thorough knowledge of measurement conventions is essential. Also covered in this module is the topic of deep foundations, concrete foundations and structural steel, measurement, masonry. Estimate the materials, labour, transport or whatever the expenses are prior to the quantities gathered from the drawings. Unless youre trying to break into new areas of the market and are willing to deal with the learning curve and. Methods of takeoff quantities explanation with solved problem. Jun, 2019 taking off construction works designing buildings wiki share your construction industry knowledge. For a small one off job, an experienced builder should be able to estimate the materials required in his or her head. Here is a list of substructure taking off according to smm7. Taking off measurement is called the process of recording dimensions in a standard way which is accepted by construction professionals. Taking off quantities for building and civil engineering works foundation.
Estimating cost for a particular construction work can be divided into categories as follows. These measurements are used to format a bid on the scope of construction. Drawing takeoff, taking off a project, or quantity surveying is the process of drawing measurements on a plan to quantify construction items. In the given below diagram, the green coloured layers are long walls and other layers represent the short walls. This method is especially applicable for the works. Quantity take off foundation engineering masonry scribd. Next, we want to quantify the length, quantities, and weights of the rebar. This is necessary to produce bills of quantities and requires that the design is complete and a specification has been prepared. During the contract period, measurement is required for provisional quantities and valuation of variations only see section 10 of pah chapter 5. How to measure for building materials homebuilding. Carry out the calculation for quantities of material for the formwork, concrete and reinforcement bar for the. It is quite usual to find such sentences in engineering books, and invoices. How to take off construction works designing buildings wiki share your construction industry knowledge.
These procedures are explained in the following papers. Readers are therefore expected to be familiar with traditional paper based takingoff procedures. Analysis and design of shallow and deep foundations. The arrow mark on the green layer shows how the length of a long wall should be measured out. Will this project work well for your companys current skillset. Examples are most rock excavation, nearly all hand excavation, and backhoe work around sewer lines, underground utilities, or existing structures. Taking off the objective of taking off is to produce a detailed list of all materials and work. It is better to change the sentence as to not use it. Taking off substructure from cutting down trees to topsoil excavation. We specialize in providing take off estimating services for construction and engineering firms at various stages throughout the construction process. Dec 15, 2017 drawing takeoff, taking off a project, or quantity surveying is the process of drawing measurements on a plan to quantify construction items.
When you analyze dimension sheets from different quantity surveyors, you will realize that the order in which measurements are entered is quite different. At the very least, mental health problems affect 1 in 4 people during their lives, but recent estimates place it much higher as 2 out of 3. Quantity survey, taking off quantities for top soil. A quantity surveyor may take off quantities from detail drawings to produce a bill of quantities for tendering purposes. Reducing wastage and unnecessary ordering of excess materials is a smart way to save money on extension, renovation and self build projects. When compared to the unit and superficial area method, the elemental estimate or elemental method of estimating is a more detailed method of calculating the cost of a construction project. Measurements are one of the most important parts in estimating the construction cost. Chapter 2 quantity takeoff the quantity takeoff is an important part of the cost estimate. Prepare taking off sheet, bill of quantities and estimate the total cost of building and civil engineering works in accordance to smmm and cesmm. Foundation walls on foundation walls i take off the quantities for form s in 4foot heights, 2 by 4 keys, slab seat bearing and conc re t e. When taking off quantities, break each item down by size, type of material, and workmanship. How to master the takeoff in construction estimating.
Using off to indicate quantity is quite common in engineering jargon. Taking off foundation concrete manmade materials scribd. Peter eade reveals the secrets of professional measuring. After the word forms i place the words in 4 foot heights in brackets. Experienced estimators have developed procedures to help them quantify their work. This simplifies the process for contractor to gather prices. Qs plus estimating software for quantity surveyors and. You will find an estimator with a clear and logical arrangement of quantities that can be easily followed and tracked. 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. The following paragraphs present the detailed quantity estimate of materials such as concrete, formworks, spacers, reinforcements, the reinforcement schedules optimization as well as the total. Take off works for better physical and mental health and we recognise the two are intrinsically linked. The quantity takeoff is an important part of the cost estimate. So we know from our example, that 4 number 4 bars would be placed per footing, for a grand total of 100 total number 4 rebar.
As with most measurement exercises it is good practice to start with a takingoff list. Material takeoff michigan technological university. The quantity take off plays an important part of the cost estimates. To find the length of excavation be careful to fully understand what the given dimension are measuring. Example taking off for substructure measurement conventions. Example taking off for substructure measurement conventions isurv.
Naturally, prices for special quantities are higher than prices for general quantities. Also list the type of construction equipment needed for each phase. Sep 12, 2015 taking off measurement is called the process of recording dimensions in a standard way which is accepted by construction professionals. How to take off construction works designing buildings wiki. Construction costing food and agriculture organization. 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. Estimating concrete work ii estimating foundation walls. 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. This process is known as takeoff or material takeoff mto and is an essential part of the estimating process. It includes a variety of trades such as clearing site, top soil removing, excavation, concrete work and masonry works. I separate my forms every 4 feet by height for pricing and i use one price for material and labor for walls up to 4 feet high. Taking off quantities is a key skill demanded of a quantity surveyor. The term taking off refers to the process of identifying elements of. Bills of quantities provide huge benefits to the contractor while creating with work sections that show likely subcontract packages.
Taking off construction works designing buildings wiki share your construction industry knowledge. The quantification process involves recording dimensions and is referred to as. Accurate quantities have to be measured from the fully completed design in the precontract stage. Here, i describe the more common methods of taking out quantities in the. Chapter 5 installation of driven piles pile buck magazine. Here, i describe the more common methods of taking out quantities in the construction field. Apr 08, 2019 taking off substructure from cutting down trees to topsoil excavation. After the word f o rm s i place the words in 4foot h e i g h t s in bra c k e t s. You just need to visualize the dimensions length, breadth, depth of the structural member be it a beam, slab, column or a footing and then you need to visualize the shapes of bars that needs to be used followed by some simple calculations. We take that factor and divide it by 27, for a grand total of 63. Thereafter standard systems were published at irregular intervals on a.
Onscreen takeoff makes it easy just draw the takeoff on the screen using a mouse or a stylus and onscreen takeoff does the rest it is easy to see when everything is taken off if it is colored, it is counted. In order to make a quantity take off of concrete work, the estimator has to find out the concrete construction unit cost for setting up of concrete footings for a foundation or retaining wall. Aug 17, 2009 taking a constant, the volume of a bag of cement is 0. Preliminaries initial site works % of total cost 2. Substructure takingoff involves all measurement work up to and including the dampproof course. Assessment of the quantities is made from detailed drawings and specifications of the project and done, as far as possible, in the order that the construction of the building will proceed. Before taking off any dimensions the quantity surveyor normally makes a careful study of all the drawings relating to the project to obtain the overall picture and become familiar with the main details. Taking off quantities civil engineering engineering books. The constructional deviation does not affect the support rebars 1 and 2, which will be formed with a total length equal to 1. Just one correction in adherence to correct use of numbers in sentences. Sgp48 measurement of quantities linkedin slideshare.
Construction estimating cost estimating estimating. Quantity take off sheets download quantity takeoff sheet. The next step is usually a visit to the site to obtain details and measurements of any work required on the site, often termed siteworks. Introduction to taking off quantities the quantification process involves recording dimensions and is referred to as taking off because it involves reading or scaling taking off dimensions from a drawing and entering this information in a standard manner on purpose ruled paper called dimension paper or take off paper. Estimating cut and fill costs is taught along with a detailed example of using cut and fill software. The taking off process can be done manually by hand or using specialized software. Quantifying rebar walkthrough quantity takeoff and.
Detailed measurement for building works the rics new rules of measurement nrm is a suite of documents issued by the rics quantity surveying and construction professional group. Also covered in this module is the topic of deep foundations, concrete foundations and structural. On foundation walls i take off the quantities for forms, 2 by 4 keys, slab seat bearing and concrete. Building quantities take off for foundations, frames and finishes 3. Beam foundation stumpcolumn slab example 1 figure 1 shows the detailing of pad footing and stump to be constructed. On smaller projects an estimator may need to measure the quantities from the tender drawings and specifications as part of a tender submission. Taking up old pavings may be included with surface digging if measured super. Quantity takeoff or calculating sheet is the common type of indexing and taking off dimensions, amounts of substance needed and sorts needed in a bidding method of a construction task. Today, the majority of bills of quantities are produced using proprietary software packages, each system having its own format for inputting dimensions and. Accuracy and completeness are critical factors in all cost estimates.
Although this is a straightforward substructure layout which would be suitable for a garage or similar nonhabitable outbuilding, the task required the candidates to take off the complete substructure. Substructure takingoff involves all measurement work. Introduction to taking off quantities take off sheet qs. Apr 30, 2014 the commercial take off quantities can be invaluable as a check on materials neededand sometimes a reminder of an item that may have been missed. Before takingoff any dimensions the quantity surveyor normally makes a careful study of all the drawings relating to the job to obtain the overall picture and become reasonably familiar with the main details. Project manager for turner and townsend, discuss quantity take off and measurement. A more thorough process is necessary for major construction projects, however. It must be as accurate as possible and should be based on all available engineering and design data. The quantity takeoff sheet comprises channelling, duct system, employees, possibility outlay as well as addition of total approximate outlay. Taking off measurements and estimating the project quantities are timeconsuming, but it is required to be done. The rules have been written to provide a standard set of measurement rules that are understandable by.
Elemental method of estimating advantages and disadvantages. Also covered in this module is the topic of deep foundations, concrete foundations and structural steel, measurement, masonry, glass curtain wall, facade and wall finishes. In our experience, a major part of the healing process is the simple act of being listened to and heard. If the excavation is to include grubbing up old foundations, state it. Taking off measuring of quantities in which the dimensions are. Construction management i basics of scheduling time estimates bill of quantities 1 topsoil excavation m3 440. Special quantities include anything that requires special care or lower production rates.