Trade Cost Production Productivity Hourly Cost Unit Cost Number Activity Unit Name Hourly Rates of Crew Man hours Duration Output Man hours Crew Hours Crew Man houn workers in Cost Cost Crew ($) (hour) (unit) (mh/unit) (ch/unit) ($/ch) ($/mh) (S/unit) (S/unit) 3 4 8. 10 11 12 13 EXCAVATION $36.00 $41.00 A. Excavate by hand EL 5 20.00 36.00 EF 1.5 20.00 $38.00 $42.00 B. Hand Trimming m2 EL 4 5.00 EF 0.75 CONCRETE m 5 $39. 00 12.00 94.00 Cuute
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- Find the duration in days for a masonry job that has 24,000 bricks with a crew of five masons and three laborers. The work day is 10 hours. The productivity of the crew is 0.103 man hour per unit (9.7087 unit/man-hour).The labour unit cost of cast in place concrete referring to the crew calculations is: O $37.22/m3 $29.91/m3 $15.01/m3 O None of the above QUESTION 18 The labour unit cost of cast in place concrete referring to the man-hour calculations is: O $30.61/m3 O $14.93/m3 O $35.98/m3 O None of the above QUESTION 19 The man hour productivity rate for footings formwork is: O 0.33 mh/m2 O 0.83 mh/m2 O 0.24 mh/m2Determine the number of modular bricks necessary for the front wall if the house shown in the figure. Add 4% for waste. Determine the cost to lay the brick. It takes a mason 6 labor hours and a laborer 8.5 labor hours to construct 100 square feet of brick. The average hourly wage for a mason ·30⁰ $42.33 and for a laborer is $21.03. -61-8⁰ ||3¹ Elevation ·16' 24' +4'.
- Estimate the total amount of cost for concrete works (class “B”) based from the following given: 10-pcs of F1 (1.2m x 1.2m x 0.3 m) 10-pcs of C1 (0.3 m x 0.3 m x 4.1 m) Floor area of 100mm thk slab-on-grade = 53 sq.m The cost of cement (40kg per bag) = 210 per bag. The cost of sand is 710 per cubic meter. The cost of gravel is 1900 per cubic meter.Calculate total cost per cubic yard of concrete, given the following: Concrete materials and batching costs = $70/cy Trucking = $6.00/cy Paving equipment = $340.00/hr - Paving labor = $500.00/hr Paver production = 120 cy/hr Incidentals $4.00/cy Overhead and profit = 20% of direct costs 1.87.0 = O2.106.8 O 3.104.4 4.99.6Discuss the problem of disposal of waste water from ready-mixed concrete oper-ations. State three alternate methods that can be used to alleviate this problem.
- Why are the Concrete Batch Plant Daily Reports important?Problem 2: Complete the missing information in the concrete placing labor cost estimating table below. Number 1 2 5 1 Component Foundation Wall to elevation Slab 10 in Beams elevated Beams elevated Member Slab elevation Interior wall Slab elevation Walls Walls Floors elevated Manhole walls Roof Headwall Carpenter foreman Cement mason Laborers Concrete pump Production rate of crew under normal circumstances = 18 m³/hr. The actual production rate can be lower in the different components based on the efficiency factor Total cost 14 12 Quantity (m3) Efficiency factor 44 59 7 14 9 12 57.2 42 8.9 Concrete placing crew 27.3 14 -8 8.5 Rate per hour $45/hr $35/hr $25/hr $55/hr Crew hourly rate ($/hr) 0.89 0.90 Cost/m3 Total 0.75 0.85 0.79 0.78 0.65 0.70 0.85 0.88 0.85 0.80 0.75 0.87 Total labor cost for concreteConvert the output of 9.9 square feet of concrete masonry unit per labor hour to labor hours per square foot.
- Calculate a m3 Rate for Concrete to Beams using Readymix and a Subcontractor to place (Please see data below) BOQ item: 25MPa (1:2:4)- 19mm stone reinforced concrete in Beams…m3. Data Readymix R1250 /m3 Waste 5% Dumper with 350lt (0.35m3) skip hired at R 1600/8hr & trip 300m one way and travels @15km/hr. Fuel for dumper 30lt/day @R20/lt Readymix Offloading distance 300m one way and load in 2 minutes, unload in 2mins, maneuver for 1.5mins and travels @15km/hr Lubrication and maintenance 15% on fuel for all plant Dumper Driver @ R70/Hr Subcontractor places concrete at R 120/m3 and has an Output of 6m3/HrFor a 4,800 sf area of roof, which has numerous valleys, hips, and dormers, what would be the most likely labor-hour for carpenters installing 3-tab, 235-lb asphalt shingles? Assume 5% of waste. 99 hrs. 95 hrs. 91 hrs. 103 hrs.Which statement is correct? A) Non-value adding activities can be completely eliminated. B) Re-installing a window (due to fixing errors) is a value adding activity. C) "Concrete structure" is the external client for the "internal walls" trade. D) Increasing cycle time reduces waste (i.e. the amount of non-value adding activities). E) On average 50% of time in a construction site is spent on non-value adding activities.