Comparative Analysis Methods Fullslab Precast Erection of Cost and Time

The Indonesian government stepped up infrastructure projects in the country for logistical and economic equality equalization, infrastructure in the form of a Freeway. This study aimed to analyze and compare the costs, timing, and precise method in Fullslab Precast erection work on 1 module. The data used are primary and secondary. Using the method of removal/erection with heavy equipment cranes. For the calculation of comparative analysis is obtained by analysis of the cost and time analysis. Field observations, and direct cost analysis calculation, and not directly into the calculations that will be loaded to get the proper method to the cost and time of work. The results of the right method are method 1 Crawler Crane at Rp 206.598.086,00.


Introduction
The Indonesian government to build infrastructure projects in the country for equalization logistical and economic equality. Infrastructure development in the form of motorway where each use is required to pay and can act as growth in the national economy and also local area income.
Development of the construction of the world is growing rapidly, it can be seen by the increasing number of development implemented in both the buildings, roads, bridges and the building needs of the community. In any construction process also needed sufficient time to complete from start to finish. Therefore, it needs careful thought to determine the most appropriate method of implementation and efficient in completing a construction project, also through good cooperation between the various parties involved, especially for large projects such as road tolls. It would also require the role of construction management that the utilization of existing resources can be maximized.
The main construction on highway projects using pile on slab method, which uses precast concrete slab construction (precast), which is based on the structure of the stake. On the field, of course, there are various obstacles. Precast slab production of sub-contractors has been delayed. With the delay affects the execution time of a job in the field. It is very influential in costs and time, as well as the area of land preparation work required before construction be carried out.
In the construction of this project Precast Erection Fullslab be the greatest work to complete the project Cibitung-Cilincing toll road that needs to be maximized Precast Fullslab work methods in order to avoid wastage of costs, time delays and have good quality.
On Construction erection Fullslab Precast using the heavy equipment 1 Crawler cranes, 1 mobile cranes, and 1 Crawler Crane with 1 Mobile cranes, so the authors are interested to analyze the comparison of methods erection Fullslab Precast against the cost and time (case study highway projects Cibitung-Cilncing section 3).
Based on the background that has been stated previously, the subject-matter of the study are: 1. What is the cost of the construction of precast

Literature Review
In terms of cost and time of use of precast cheaper and faster than using cast in situ. But the precast method emphasized that requires precision and expertise both in the production process and in the installation process. [1].
Crawler crane is a heavy equipment used to haul the load either horizontally or vertically, crawler cranes have the ability to rotate 360˚ to maneuver easily and practically. [2] Thin structure made of reinforced concrete with a field whose direction is horizontal, and the load acting perpendicular to the field of the structure. The thickness of the field plate is relatively very small compared with the span / width fields. [3] Precast Concrete (Precast Concrete) is concrete that is printed in multiple locations (both within the project as well as in factories), which in turn mounted in position by a connection system so that the circuit elements for the sake of precast concrete elements into a coherent whole as a structure (Plant cast Precast and Presetressed). And "Half Precast is a system of reinforced concrete slab that half of them printed off-site (precast) and half of them are printed on the spot (cast in situ)." [4]

Project management
Construction project management is planning, organizing leading, and controlling resources to achieve shortterm goals have been determined.
In planning and implementing the project, there are three things that has always been a benchmark for the success of the project, all three measures are: a. Great cost (budget) allocated That project should be completed at a cost that does not exceed the budget. b. Project implementation schedule.
Ie the time the project should correspond to the time period specified. c. Quality products (output of the project) Namely the quality of the results of the project must meet the specifications defined and as expected until the period has been planned (the design life).
Project Management Functions a. Planning / plan Planning /planning an act of decision-making data, information, assumptions or facts selected activities and will do in the future. b. Organizing /organizing Organizing is an action to collect a human activity behrdasarkan their respective duties and are interconnected to one another by any particular procedure. Organization formed will succeed if each member is able to cooperate with the aim of achieving a common goal. c. actuating /Implementation Implementation is an attempt to move the organisani accordance with the wishes and their efforts to achieve its goals and members are organized for each member also has personal goals d. controlling / Control Control is tersistematis efforts of the company to achieve its objectives by comparing presstasi work with the plan and make the appropriate action to correct an important difference. Benefits of control is to minimize the possibility of errors occurring in terms of quality, quantity, cost and time.

Project Cost Management
Project cost management is a process or activity that is needed to ensure that the project will be completed within the budget approved.

Project Cost
Cost is the sacrifice of economic resources that are usually measured in terms of money, whether that has happened, is happening, or might happen for a particular purpose. Various things in our activities is also not free of charge, especially for a project in the company.
The calculation of the cost of the project is very important in controlling the available resources given the available resources are limited. To that end, the role of an engineer is twofold cost, estimate project costs and control (control) the realization of the cost in accordance with the restrictions that exist in the estimation. There are two types of project costs, namely: VOLUME 2 │ NUMBER 2 │ MARCH 2020 Available online at http://proceedings.worldconference.id. ISSN: 2656-1174 (online) a. Direct Cost (Direct Cost) Direct costs are costs associated with the implementation of the construction project work in the field. The direct costs of the construction project can be estimated by calculating the volume of work and the cost of the project based on the unit price of the work. b. Indirect Costs (Indirect Cost) Indirect costs (Indirect Cost) are all project costs that are not directly related to the construction field. Nevertheless, indirect costs must exist and can not be separated from the ongoing project. These indirect costs have not been explicitly calculated for each construction project but need to be estimated for the allocation of costs beyond construction work.

Project Cost Analysis
Calculation of the budget usually consists of five basic things: a. Manpower ie calculating working hours required and the number of his charges. b. Material which count the number of materials used and price. c. Machine namely calculate type and amount of equipment used and the cost. d. Methode ie calculate the costs and time based methods of work necessary to complete the project e. Money calculate the percentage gain of the time, place and type of work.

Budget plan
Budget Plan (RAB) is the amount of expected costs in project work which is based on the volume of each work item in the picture or guidelines. RAB filed by the contractor at the time of bidding, in which the RAB is used benchmark for the contractor to submit a bid. This fee is in addition to depending on the volume, also heavily dependent on labor and employee wages, prices of material required and contracting services as well as taxes. [5]

Employment Analysis Unit price
Unit price is the amount of material prices and labor costs based on the calculation analysis. Material prices obtained on the market, collected in a list called list unit prices of materials. Labor wages earned in the location, collected and recorded in a list called list unit prices of materials. The unit price of materials and labor in each different region. So in calculating and preparing the budget of a building / project should be based on the unit price of materials and labor in the market and work locations.

Scheduling
Scheduling is a planning phase translates into a diagrams in the form of activities in accordance with the time scale in which each activity should be carried out so that the project is completed on time at economical cost. One example is the scheduling method PDM. [5]

Productivity
Factors that affect the productivity of which is a tower crane in field conditions, the condition of the tool, management factors and the ability of the operator. In this study, the condition of equipment and the operator's ability is considered normal and does not affect the data taken during the observation in the field. While field conditions in the form of tall buildings in the vicinity of the project, bad weather, material load in the lift, as well as management factors which include tower crane layout and placement of materials thought to affect the observed data in the field. [6]

Lifting Heavy Equipment Material Type 2.7.1. Tools Crawler Crane
Air is lifting material used in the construction project site with a range that is not too long. This type has a top that can move 360 degrees. With the wheels crawler cranes of this type can be engaged in the project site while doing his job. At the time of the crane will be used another projected then a crane lifted using lowbed trailer. VOLUME 2 │ NUMBER 2 │ MARCH 2020 Available online at http://proceedings.worldconference.id. ISSN: 2656-1174 (online)

Tools Mobile Crane
Mobile cranes is one type of alternative heavy equipment tower crane when a project requires heavy equipment that includes a height with high mobility, and can also be used in construction, such as bridges, roads, dams and other development work. Mobile crane has a boom that is supported by the main structure (super structure plat form), this boom may be a frame (lattice) of steel (frame work) with the control cable as a means pengangkatnya on the mobile crane-type crawler, or may be a boom arranged with hydraulic control on the type of hydraulic mobile crane.

Research Methodology
The method used in this research iswhich analyzes the use of methods fullslab precast erection with heavy equipment Mobile Crane Crawler Crane and in terms of cost and time. The analytical method used is descriptive quantitative. A quantitative approach is research that focuses on hypothesis testing, data used should be measured, and produce conclusions that can be generalized. This approach uses a method (analyzer). To achieve the objectives, the necessary data to be used for processing in accordance with the theoretical basis acquired. The data itself is divided in two; primary data and secondary data. The primary data of the data obtained and collected through direct survey to the study site. Secondary data can be obtained by searching through the internet, coworker or go directly to the office or agency concerned. If the data obtained to continue the research has not met, then the required return for the collection of such data. Criteria Expert: a. Experts in the field of infrastructure, and / or representation in Government. b. Minimum S1 or S2. c. At least 25 years of experience to S1 and S2 at least 10 years for. VOLUME 2 │ NUMBER 2 │ MARCH 2020 Available online at http://proceedings.worldconference.id. ISSN: 2656-1174 (online) To achieve the objectives of this research, the study is divided into several stages, including:  setting CraneCrawler crane will be set in the landscape in erection by considering the actual length Precast Full Slab, clearances, and all objects that can be annoying at the time of erection work. The land that would become the foundation of Crawler Crane must be ensured robust and stable, to avoid displacement crawler crane during the erection process which would jeopardize for the job. setting Crane, Installation of Outriggers (foot Mobile Crane) will each pick-up load, outriggers should be installed or removed, the more distant landscape outriggers, the more stable and secure. To be safe again, each shoe tread outriggers still to be propped up with wooden beams or steel plate to prevent subsidence when lifting weights because of a decrease in side outriggers can be fatal and can result in the crane overturned.

Productivity analysis
Precast recapitulation obtained Fullslab size and productivity calculation of each method presented in the following

Cost Calculation Method Works
The value of direct costs and indirect costs of each -each method of implementation can be summed for each method of execution.

.4 Time Calculation Method Works
The fact the field tool of any of these methods operated for 8 hours a day, which means 480 minutes a day. Furthermore, it can be calculated Fullslab Precast erection process completion day.

Discussion
The results of the comparison of cost and time obtained by the method 1 Crawler Crane has a more economical price but has a longer period of time compared to other methods. Method 2 with Mobile Crane has a shorter work time. Method 1 Mobile Crane can not Fullslab Precast erection if not assisted by a truck trailer. Method 3 (1 Crawler Crane with 1 Mobile Crane) has a large cost compared to other methods. The time gained is greater than the first method Mobile Crane but faster than the first Crawler Crane. Method 1 Crawler Crane with 1 Mobile Crane has the advantage in the work area of land that has a different ground elevation.

Conclusions and Recommendations
The analysis and discussion in the previous chapter and answer from the formulation of the problem, it can be concluded as follows:

1.
Precast Fullslab who come should be implemented immediately because the work tool that rental prices have been running an hour and a unit will continue to run. 2. For areas that have a different elevation should use methods 2 or 3 for Mobile Crane outrigger can issue as a basic foundation on different surfaces. 3. If speed up completion of the work should use the method 2 because it has a faster productivity which is 13 minutes / Fullslab Precast compared to other methods.