[email protected] table 2. productivity concrete
TRANSCRIPT
Introduction
There are several types of materials that are often used in designing the main structure of
building construction as columns or beams. Currently, one of the most popular materials are
IWF / H-Beam Steel and Reinforced Concrete. The selection of methods for the implementation
of construction project work is very influential on quality, time and cost. Construction methods of
steel structure work and reinforced concrete structures are very different. Each method has both
advantages and disadvantages in terms of its nature or character, economic aspect and
environmental aspects.
The structure of residential buildings generally use reinforced concrete. However, recently steel
structures have been used, especially in the column and beam structure, as in the object of the
study which was reviewed, namely the Highland Nusa Dua Housing development project,
Badung regency. The use of steel structures in the columns and beams will be composite using a
mixture of plaster. Composite columns and beams using concrete are not formed a square profile
as reinforced concrete, but only plastered by the IWF body part because the wing of the IWF has
been aligned with a light brick. On the slab work is not used assembly reinforcement and plate
formwork, because it usually uses factory reinforcement (wiremesh) as reinforcement plates and
bondex as the support of wiremesh.
The selection of the main structural material is not only considered in terms of strength, but the
designer will consider the effectiveness in terms of time and cost of implementation. This
research was conducted to determine the comparison of the two methods to the time and cost of
implementation by using the Break-Even Point Method, therefore it can be analyzed how many
volume between steel structure work and reinforced concrete structures effective to be used as
the main structure of a residential are building.
COMPARISON OF CONSTRUCTION METHOD BETWEEN TWO STOREY
BUILDING STEEL STRUCTURE AND REINFORCED CONCRETE
STRUCTURE REGARDING TIME AND COSTS IMPLEMENTATION A. Frederika and A. A. Wiranata
Research Methods
The implementation of the research to be more clear and directed, is carried out by following the flow chart as in Figure 1.
Results and Discussion
Productivity, Unit Price, and Break Evan Point Observation results in volume, time, and number of labor of each column work, beam and floor
slab structure in the implementation of the Highland Nusa Dua Housing project, type 120
residence (2 storeys), with steel structure and reinforced concrete methods, is calculated based
on productivity for column work, beams and slabs. The results of productivity calculations are
shown in Table 1 and Table 2. Based on the productivity resulted, the implementation costs of
each method can be calculated as shown in Table 3 and Table 4. Then time and costs
implementation was recapitulated (Table 5) to obtain Regression Equations and Correlation,
hence the break-even point of the volume between the steel structure construction methods
and reinforced concrete can be analyzed towards time and cost. Break-even point results are
shown in Table 6.
Table 1. Productivity Steel Structure
Conclusion The conclusion of this research is :
1. Comparison of time and cost in implementation of building structures using steel
structure and reinforced concrete structures is 158 hours (20 working days): 190 hours
(24 working days) and Rp. 77,696,287.00: Rp. 72,224,407.00 respectively. The
implementation time using steel structure method is 4 days faster, while the cost is Rp.
5,471,880.00 greater than reinforced concrete structure method.
2. The break-even point of volume between steel structural work and reinforced concrete
structures towards time is in column volume, beam, and plate (74.44 m '; 69.84 m'; and
66.36 m2) with a total time of 190 hours (24 working days); volume towards cost in
column volume, beam, and plate (86.4 m '; 67.2 m'; and 74.4 m2) with a total cost of Rp.
93,235,544.40. Therefore the break-even results provide a indication that starting at that
volume point is more effective to use the steel structure method and vice versa.
Acknowledgement This study was funded by the Udayana University PNBP DIPA FY 2018 with Conceler SK number.
435/UN 14/LT/2018 contract number: 1647 / UN 14.2.5.II / LT / 2018, March 29, 2018..
Bibliography
Figure 1. Research Flow Chart
Table 2. Productivity Concrete Structure
Regarding
a b c d e f = c*d g
1 Steel column work 1356.94 kg 14,718.00 19,971,442.92 29.64
Wire installation 61.2 m2 22,050.00 1,349,460.00 8
Formwork column 36.72 m2 184,284.00 6,766,908.48 16
Casting concrete 1.156 m3 2,218,685.00 2,564,799.86 28
Colomn work total
2 Steel beam work 1539.89 kg 15,600.00 24,022,284.00 41.95
Wire installation 36.5 m2 22,050.00 804,825.00 5
Formwork column 0.365 m3 3,688,685.00 1,346,370.03 12
Beam work total
3 Bondek floor (without cast) 55.25 m2 259,947.00 14,362,071.75 9.5
4 Casting concrete 6.63 m3 981,695.00 6,508,637.85 8
Sub-Total 158.09
30,652,611.26
26,173,479.03
77,696,799.89
Duration
(Hour)NO Job description VOL. UNIT
UNIT PRICE
(Rp)
TOTAL PRICE
(Rp)
a b c d e f = c*e g
1 Structure column work
Reinforcement 705.04 kg 11,225.00 7,914,074.00 64
Formwork column 55.08 m2 227,884.00 12,551,850.72
Casting concrete 2.754 m3 933,695.00 2,571,396.03 8
Total 72
2 Structure beam work
Reinforcement 741.97 kg 12,450.00 9,237,526.50 48
Formwork column 52.33 m2 288,534.00 15,098,984.22
Casting concrete 2.61 m3 961,245.00 2,508,849.45 8
Total 56
3 Structure plate work
Reinforcement 620 kg 9,380.00 5,815,600.00 8
Formwork column 55.25 m2 211,084.00 11,662,391.00 42
Casting concrete 6.63 m3 733,595.00 4,863,735.00 12
Total 62
Sub Total 190
23,037,320.75
26,845,360.17
22,341,726.00
72,224,406.92
No Job description Vol. Unitunit price
(Rp)
Total price
(Rp)
Duratio
n
(Hour)
Table 3. The cost of carrying out steel structure work Table 4. The cost of carrying out concrete
structure work
Table 5. Recapitulation of time and cost of structural work
Job
description Total Unit Total Unit
a b c d e f = c/e g
1 Column Structure
Reinforcement 705.04 kg 64 11.01 kg/hour
Formwork 55.08 m2 56 0.98 m2/hour
Casting concrete 2.754 m3 8 0.344 m3/hour
128
2 Beam Structure
Reinforcement 741.97 kg 48 15.46 kg/hour
Formwork 52.33 m2 42 1.25 m2/hour
Casting concrete 2.61 m3 8 0.33 m3/hour
98
3 Struktur Plat Lantai
Reinforcement 620 kg 8 77.5 kg/hour
Formwork 55.25 m2 42 1.31 m2/hour
Casting concrete 6.63 m3 12 0.55 m3/hour
62
Total Duration of Concrete Structure work
NoDuration
(Hour)
Volume Productivity
Total Duration
Total Duration
Total Duration
288 Hour or 36 day
Job
Description Total Unit Total Unit
a b c d e f = c/e g
1 Column Structure
Perforation 450 sheets 11.83 38.04 sheet/jam
Catting 1920 cm 1.8 1066.67 cm/jam
Painting 61.2 m' 0.51 120 m'/jam
Welding and Assembly1356.94 kg 15.5 87.54 kg/jam
29.64
2 Struktur Balok
Perforation 480 sheets 12.16 39.47 sheet/jam
Catting 8377 cm 11 761.54 cm/jam
Painting 58.15 m' 0.29 200.52 m'/jam
Welding and Assembly1539.89 kg 18.5 83.24 kg/jam
41.95
3 Struktur Lantai
Bondek installition 55.25 m2 4 13.81 m2/jam
wiremesh Installition 310 m2 3 103.3 kg/jam
Formwork Installition36.5 m2 2.5 14.6 m'/jam
Casting 6.63 m3 8 0.83 m3/jam
17.5
4 Wire Installition 59.91 m2 8 7.48 m2/jam
Columns and Beams plastering1.589 m3 6 0.26 m3/jam
14
Duration Total
Total Duration
Total duration of Steel structure work 122 hour or 22 day
Total Duration
Total Duration
Volume ProduktivityNo
Duration
(Hour)
1 Column Structure 61.2 m' 81.64 30,652,611.00 72 23,037,321.00
2 Beam Structure 58.2 m' 58.95 26,172,966.00 56 26,845,360.00
3 Plate Structure 55.3 m2 17.5 20,870,710.00 62 22,341,726.00
Total Comparison of construction method 158 hour or 20 day 77,696,287.00 190 hour or 24 day 72,224,407.00
No Job Desctription Vol Unit
STEEL CONCRETE
Duration (Hour) Cost (Rp) Duration (Hour) Cost (Rp)unit X Y (jam) unit X (m3) Y(juta)
1 Column Structure m' 73.44 97.968 m' 86.4 36,783,133.20
2 Beam Structure m' 69.84 70.74 m' 67.2 31,407,559.20
3 Plate Structure m2 66.36 21 m2 74.4 25,044,852.00
189.708 93,235,544.40
Break Even point of Steel Structure and Concrete Structure
Volume and Time Volume and Cost
BEP Volume for Time and Cost
No Job Description
Table 6. Break Even Point Volume
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