Infrastructure Design Practice of Building, Road, Water Structure and Cost
and Time Planning is a recapitulation of project practice that has been conducted
during the study of civil engineering program at Universitas Atma Jaya Yogyakarta.
This recapitulation consists of design calculation and planning estimation. Each
practice has different objective, so the practitioner has to learn to analyze and design
of each different infrastructure practice.
In building design practice, analyzing and designing of a 4-story building is
the main focus. Its aim is to design and calculate whether the building is stable or
not. The term stable refers to meet the standards of SNI. In this practice the method
used was by using ETABS program to design the whole structure, AutoCAD
program to assist in detailing process of building structure design, and PCACOL
program to assist calculating for column structure reinforcements, also manual
calculations by analyzing of each structure are needed to ensure that the whole
structure is stable by referring to the standards of SNI. In conclusion from the
problems and methods of this practice that is done, the author can conclude that in
this practice the designed building and its structures has met valid standards that
refers to SNI (Standar Nasional Indonesia).
In the practice of road design, the main focus is to analyze a certain
intersection that uses traffic light to control the movement of vehicles that passes
through the intersection. The aim of this practice is to design the traffic lights time
period and calculate the delay of vehicles. The method used was recording and
count the vehicles that is passing through the intersection and calculating the data
by using Webster’s method. From the practice that is done the author can conclude
that the design that has been calculated by using Webster’s method can be used to
determine the traffic lights period and delay of vehicles.
The main focus of water building design practice is to analyze the Kadirejo
weir to use the average daily precipitation as the data and estimate the upcoming
flood discharge of a weir building. This practice also studied about determining
whether the weir is safe and stable. While the method used is Frequency Analysis
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method to find the probability distribution, then using the normal logarithm method
to estimate the upcoming rainfall date and using the Haspers’ method to estimate
the weir flood discharge. By studying this practice, the author can conclude the weir
flood discharge of 200 years’ future return period is 720,068 m3/s and the weir
structure is stable and safe against different factors of safety.
The last practice summary is cost and time planning, its focus is to calculate
the total cost required of the project and estimate the time to completely finish a
building construction project. Manual calculation method is conducted by
referencing the SNI to estimate the project cost and time is the method used for this
practice. By calculating the work volume of the project and the unit cost of materials
and labor, the total cost of the project can be obtained. Continue to the calculation
of work duration estimation, then proceed to create network diagram, bar chart, and
s-curve. After the author has completed this practice, the conclusion is that the
calculations made for cost and time estimation used to build the project can differ
from the actual field, because some factors including weather, and the others may
happen outside of SNI reference calculations.