Quantity Surveying FIGURE 1-1 MEASURING BOXTABLE 1-2 CONCRETE PROPORTIONCement in BagMixtureSandGravelClassProportion40 kg.50 kg.cu. m.cu. m.MARCAA1:1 %312.09.5.501: 2 : 49.07.0.50B1: 2% 57.56.01:366.05.0.50555550222201.01.01.01.0Situation 1: A proposed concrete pavement has a generaldimension of 10cm thick, 3.00m wide and 5.00m long.Determine the quantity of cement in bags, sand and gravelin cubic meters required using class "C" mixture (40kgand 50kg respectively).Situation 2: A rural road 6.00 meters wide after basepreparation requires concreting of one kilometer long.Find the number of bags cement, sand and gravel usingclass "A" concrete if the slab is 6 inches thick (40kg and50kg respectively).Situation 3: A concrete post 4.00 meters high with cross-sectional dimensions of 40cm x 40cm is supported by afooting slab 20cm thick by 1.20m square. Using class "A"concrete, find the quantity of cement, sand and gravel ifthere are 12 posts of the same size (40kg and 50kgrespectively).

Answered: Image /qna-images/answer/a077a0b4-5056-4f70-8c71-377404acad83.jpg

Answered: FIGURE 1-1 MEASURING BOX TABLE 1-2…

Fundamentals Of Construction Estimating

4th Edition

ISBN:9781337399395

Author:Pratt, David J.

Publisher:Pratt, David J.

Chapter10: Pricing Excavation And Backfill

Section: Chapter Questions

Problem 7RQ

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Two materials, A and B, are to be separated using two unit operations, 1 and 2. The feed has 10 tons/h A and 4 tons/h B. The split (fraction of material rejected by each operation) is given in Table P5-14. a. Which sequence of operations, (l?2) or (2?1), will yield the greatest recovery of material A? b. What will be the purity of material A using that sequence? c. What will be the efficiency of separation for the entire process train with regard to material A using the Worrell-Stesed equation?
Calculate the cost per cubic yard to place concrete using each of the alternatives described. The work in both cases consists of placing 140 cubic yards of concrete in footings. a. Using a crane and bucket at a price of $225 per hour, including an operator, with a crew consisting of 6 laborers, a cement finisher, and a foreman. The concrete will be placed in 7 hours using this setup, and transportation of the crane costs $390. b. Using a concrete pump at a price of $295 per hour, including an operator and a crew consisting of 5 laborers, a cement finisher, and a foreman. With this setup, concrete is placed in 6 hours and transportation of the pump costs $290.
Redo Problem 12.30 assuming that the water table coincides with the top of the fill and that sat(fill) = 19.8 kN/m3. If the other quantities remain the same, what would be the downward drag force on the pile? Assume ' = 0.5fill. 12.30 Figure 12.49a shows a pile. Let L = 15 m, D (pile diameter) 305 mm, Hf = 3 m, fill = 17.5 kN/m3, and fill = 25°. Determine the total downward drag force on the pile. Assume that the fill is located above the water table and that = 0.5fill.
A concrete pile 16 in. 16 in. in cross section is shown in Figure P12.13. Calculate the ultimate skin friction resistance by using the a. method [use Eq. (12.61) and Table 12.11] b. method c. method Use R=20 for all clays, which are normally consolidated.
A steel pile (H-section; HP 360 1.491; see Table 18.1) is driven into a layer of sandstone The length of the pile is 18.9 m. Following are the properties of the sandstone: Unconfined compression strength = qu(lab) = 78.7 MN/m2 Angle of friction = 36 Using a factor of safety of 3, estimate the allowable point load that can be carried by the pile. Use Eq. (18.42).
Why is nothing added to the concrete quantities for wastage at the time of the takeoff?
Why is it recommended that the estimator begin a takeoff of concrete work by measuring the quantity of concrete in an item rather than the amount of formwork?
A driven closed-ended pile, circular in cross section, is shown in Figure P12.7. Calculate the following. The ultimate point load using Meyerhof’s procedure. The ultimate point load using Vesic’s procedure. Take Irr = 50. An approximate ultimate point load on the basis of parts (a) and (b). The ultimate frictional resistance Qs. [Use Eqs. (12.42) through (12.44), and take K = 1.4 and δ′ = 0.6ϕ′.] The allowable load of the pile (use FS = 4).
A steel pile (H-section; HP 310 125; see Table 12.1a) is driven into a layer of sandstone. The length of the pile is 25 m. Following are the properties of the sandstone: unconfined compression strength = qu(lab) = 80 MN/m2 and angle of friction = 36. Using a factor of safety of 3, estimate the allowable point load that can be carried by the pile. Use [qu(design) = qu(lab)/5].
Refer to the pile shown in Figure P9.1. Estimate the side resistance Qs by Using Eqs. (9.40) through (9.42). Use K = 1.5 and Coyle and Castello’s method [Eq. (9.44)]
Which would separate a mixture of steel and aluminum cans, a boance and adherence separator or a ferrous magnet? Explain why.
Redo Problem 12.20 using Vesics method, assuming that the skin friction is distributed uniformly along the shaft. 12.20 A 600 mm diameter and 25 m long driven concrete pile carries a column load of 1200 kN. It is estimated that the shaft carries 900 kN and the point carries 300 kN. Determine the settlement of the pile head using the Poulos and Davis method with the following data: Es = 25 MN/m2, Ep = 30,000 MN/m2, and s = 0.2

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