| Course | MT281 Fundamentals of Construction Management |
|---|---|
| Unit | Unit 4 |
| Paper type | Quantity takeoff |
| Length | About 880 words, 6 pages double-spaced |
| Format | APA 7 student paper |
| School | Purdue University Global |
| Program | BS in Business Administration |
| Updated | October 2026 |
Free sample paper for MT281 Unit 4
From Plan Dimensions to Purchase Orders: A Unit 4 Quantity Takeoff for the Station 2 Slabs, Foundations and Block
[Student Name]
Purdue University Global
MT281: Fundamentals of Construction Management
Unit 4 Quantity Takeoff
[Instructor Name]
[Date]
Station 2, its drawings, dimensions and waste factors are composite and illustrative; conversion factors are standard industry values; the sources cited are real.
Scope and Method
This takeoff measures the concrete, reinforcing steel, concrete masonry and geotechnical undercut for Station 2, a 12,864-square-foot fire station with a 5,376-square-foot apparatus bay and a 7,488-square-foot living wing. Each line gives the item, its section number in the CSI MasterFormat system (Construction Specifications Institute, 2020), the drawing it comes from, its dimensions, the formula, the net quantity, a waste factor and the order quantity in the unit the supplier sells. Net quantities are what the drawings show; order quantities add waste for spillage, cutting, over-excavation and breakage. Peurifoy et al. (2018) describe this separation of net and ordered quantities as the basis of reliable estimating, because each can be checked on its own terms.
All dimensions come from the bid set as revised by the drawing and specification review, including the 9-inch question on the bay slab, which is still open; the takeoff uses 8 inches as drawn and notes the difference.
Concrete
Apparatus bay slab, Section 03 30 00, sheet S-101.
Dimensions: 64 by 84 feet, 8 inches thick
Formula: 64 × 84 × 0.667 ÷ 27
Net: 132.7 cubic yards; waste 5 percent; order 140 cubic yards
If the slab becomes 9 inches, net rises to 149.3 and the order to 157
Living wing slab, Section 03 30 00, sheet S-101.
Dimensions: 7,488 square feet, 5 inches thick
Formula: 7,488 × 0.417 ÷ 27
Net: 115.6 cubic yards; waste 5 percent; order 122 cubic yards
Continuous footings, Section 03 30 00, sheet S-102.
Dimensions: 564 linear feet of wall, footing 24 inches wide by 12 inches deep
Formula: 564 × 2 × 1 ÷ 27
Net: 41.8 cubic yards; waste 5 percent; order 44 cubic yards
Foundation walls, Section 03 30 00, sheet S-102.
Dimensions: 564 linear feet, 8 inches thick, 4 feet high
Formula: 564 × 0.667 × 4 ÷ 27
Net: 55.7 cubic yards; waste 5 percent; order 59 cubic yards
Reinforcing Steel
Bay slab reinforcement, Section 03 21 00, sheet S-101: #5 bars at 12 inches on center each way.
Bars running 84 feet: 65 bars, 5,460 linear feet
Bars running 64 feet: 85 bars, 5,440 linear feet
Total: 10,900 linear feet at 1.043 pounds per foot, 11,369 pounds
Laps and splices at 10 percent: 12,506 pounds, about 6.25 tons
The bar count adds one bar to each run so that both edges are covered, a common takeoff error when spacing is divided into length without the extra bar.
Concrete Masonry
Bay walls, Section 04 22 00, sheets A-201 and A-202. The bay has two 64-foot exterior walls carrying the drive-through doors, one 84-foot exterior wall and the 84-foot fire wall shared with the living wing.
Gross wall area: 296 linear feet × 24 feet high, 7,104 square feet
Openings: six sectional doors at 12 by 14 feet, 1,008 square feet, plus personnel doors and windows, 111 square feet; total 1,119 square feet
Net wall area: 5,985 square feet
Block per square foot for 8 by 16 inch nominal units: 1.125
Net block: 6,733; waste 5 percent; order 7,070 block
The door openings use the 12 by 14 size that governs under the order of precedence. Using the drawing's 12 by 12 would have overstated block by about 170 units.
A takeoff that ignores the document review measures the building that was drawn, not the one that will be built.
Geotechnical Undercut
The geotechnical report requires removing soft clay to 2 feet below the bay slab and replacing it with compacted granular fill, Section 31 23 00.
Excavation: 5,376 × 2 ÷ 27 = 398 bank cubic yards out
Fill: 398 × 1.25 swell factor = 498 loose cubic yards to haul in
The swell factor converts the volume measured in place to the volume a truck carries, since granular fill loosens when excavated and compacts again when placed. Peurifoy et al. (2018) give swell factors of about 20 to 30 percent for common granular materials; 25 percent is used here.
What This Takeoff Leaves Out
Several concrete items are not measured here: the exterior aprons, sidewalks, the generator pad and equipment pads. The aprons in particular need the 4,500 psi air-entrained mix the specification requires, so they will be ordered separately from the slabs. Those items, together with the living wing's veneer, are priced by area in the cost estimate rather than measured line by line, because their drawings are still being revised.
How Precise the Arithmetic Should Be
Net quantities are carried to one decimal place, and order quantities are rounded up to whole units of sale. Rounding down would leave the crew short on the last pour, which costs more than a fraction of a yard. The waste factors are deliberately uniform at 5 percent for concrete and block on this small building; a larger or more complex job would set them by item. RSMeans (2024) data publish typical waste allowances that support these choices.
References
Construction Specifications Institute. (2020). MasterFormat 2020 edition: Master list of numbers and titles for the construction industry. Construction Specifications Institute.
Peurifoy, R. L., Schexnayder, C. J., Shapira, A., & Schmitt, R. L. (2018). Construction planning, equipment, and methods (9th ed.). McGraw-Hill.
RSMeans. (2024). Building construction costs with RSMeans data 2024. Gordian.
MT281 Unit 4 instructions, in plain terms
Unit 4 asks students to measure quantities from construction drawings and convert them into amounts a supplier would accept. For each item, record the CSI section, the drawing reference, the dimensions, the formula, the net quantity, a waste factor and the order quantity in the unit of sale. Keep net and order quantities separate so each can be checked. Use dimensions from the latest documents, including any changes from the drawing review, and note open questions that could change a quantity. Conversion factors, such as block per square foot or swell for excavated material, should be stated and sourced. Round order quantities up. A six-page takeoff sheet with short explanations of method and precision is a common format.
Inside the MT281 Unit 4 example
The takeoff states its scope, method and the open 9-inch slab question, citing Peurifoy and colleagues on net and ordered quantities. Concrete lines for the bay slab, wing slab, footings and walls follow with formulas, under a margin note on letting the ready-mix plant check each line. The rebar section counts bars each way, adds one bar per run and applies laps. The masonry section uses the 12 by 14 door openings that govern, and the highlighted line warns that ignoring the document review measures the wrong building. The undercut section converts bank to loose volume with a 25 percent swell. Sections on items left out, such as the aprons, and on rounding and waste close it with RSMeans, under a final note.
Where the points sit in the MT281 Unit 4 rubric
Quantity takeoffs are graded on accurate arithmetic, transparent formulas, correct units and sensible waste factors. Every line should be reproducible from the drawings by another estimator. Instructors reward takeoffs that separate net from order quantities, state conversion factors with sources and round up to units of sale. Using the current documents, including resolutions from the drawing review, shows the takeoff is connected to the project rather than to an outdated drawing. Noting open questions and their effect, such as a thicker slab, shows care. Common errors such as dropping the extra bar in a spacing count lose points. Clear organization by item and accurate citations complete the rubric. A note on why order quantities round up, and noting items left for later pricing, shows the takeoff was written for the people who will buy the material.
MT281 Unit 4 help from the desk
Students often present quantities without formulas, which makes errors impossible to find. Another frequent problem is mixing units, such as cubic feet and cubic yards, or forgetting to convert inches to feet. Some takeoffs apply waste to net quantities inconsistently, or round down and leave the crew short. Others use outdated door sizes or slab thicknesses. Check every multiplication twice, and keep a list of items you deliberately left out so nobody assumes they were forgotten. Send the drawings or dimensions you are working from, and a writer can set up the takeoff sheet and show each formula from dimension to order quantity.
Get an MT281 Unit 4 example written to your instructions
Share the plan sheets, sections or dimensions the Unit 4 prompt provides, the list of items to be taken off, and the instructions with their rubric, noting if a spreadsheet is expected. Within 24-48h the first takeoff arrives free, every row carrying its drawing reference, formula, waste allowance and an order quantity in purchasable units. The paper above is an original model document written by our desk, not a submitted student paper and not an official Purdue University Global document.
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MT281 Unit 4 questions, answered
What waste factor should a takeoff use?
One suited to each material and stated openly. Concrete and block often carry around 5 percent, rebar more for laps, and some materials, such as sheet goods cut to fit, considerably more. If your course text or instructor gives figures, use those. The sample lists each factor on its own row so a reader can change one without redoing the sheet.
Why separate net and order quantities?
Because they answer different questions. The net figure is what the drawings show and is the basis for checking the design; the order figure is what gets bought, after waste and rounding to how the material is sold. Blending them hides decisions a reviewer needs to see, and it makes the later cost estimate harder to trace.
How precise should the arithmetic be?
Precise enough to repeat, then rounded to how the material is sold. Carry a decimal through the calculation and round only in the order column, so concrete goes to whole cubic yards and block to whole units or pallets. Show the formula on each row; a correct total with no visible working earns less than it should.
Where can I find a free MT281 Unit 4 sample paper?
The complete MT281 Unit 4 quantity takeoff is on this page. It converts a fire station's slab, footing, wall, rebar, block and undercut dimensions into order quantities with formulas and waste allowances shown.
Why does the MT281 Unit 4 sample use 12 by 14 foot door openings?
Because the specification governs over the drawing under the contract's order of precedence. Using the drawing's 12 by 12 doors would have overstated the block needed by about 170 units.