analysis of half slab

Efficiency Analysis Half Slab Method of Precast

Concrete SlabBayu Pinasthika (1200960234)

Friska Oktaviana (1200986681)

Outline

1. Project Spesification2. Project Location3. Project Site Plan4. Project Organization5. Structure Coordination6. Management

Construction7. Half Slab Construction

Method8. Half Slab Spesification

9. Half Slab Construction Documentation

10. Safety, Health & Environment

11. Quality Control12. Half Slab Price

Comparision13. Conclusion14. Recomendation

Project Spesification

Project Name : Puri Parkview Apartement

(Tower C) Build Type : Apartement Location : Jl.

Pesanggarahan No. 88

Kebon Jeruk, Jakarta Barat Number of Floors : 24th Floors Floor Area : 18.945 m2

Number of Basement : 1st Floor

SMA 112

Jalan TolJakarta -

Tangerang

Jl. Pesanggrahan

Sungai Pesanggrahan

Project Site PlanJl. Pesanggrahan No. 88

Kebon Jeruk, Jakarta Barat

Project Site Plan

Tower C

Project Organization

Owner • KSO PT. Pelaksana Jaya Mulia• PT. Alam Jaya Perkasa

Construction Management • PT. Perentjana Djaja

Architect Consultant • PT. Megatika International

Landscape Consultant • PT. Elvolver

Design & Built Contractor • PT. Catur Bangun Mandiri

Foundation Planner • PT. Geotechnical Engineering Service

Structure Planner • PT. Baganusa Dayaprima

MEP Planner • PT. Metakom Pranata

Structure Coordination

Owner

KSO PT. Pelaksana Jaya Mulia

PT. Alam Jaya Perkasa

Consultant Architect

Contractor

PT. Catur Bangun Mandiri

Consultant Supervision

PT. Perentjana Djaja

Planning Consultant

Management Construction

Management

Construction

Quality

CostTime

Half Slab Construction Method Production Erection

Preparation Move Installation Time Back

Topping Wire Mesh Installation Concrete Pouring

Half Slab Spesification

Area : 18.945 m2

Volume Foundry Plans : 1.326,15 m3

Steel Bar Quality : BJTD 40 Thick : 7 cm Concrete Quality : K-300 / 24.900

MPa Concrete Slump : 10 cm ± 2 cm Thick Concrete Cover : 3 cm Admixture (Fly Ash) : Maximum 15%

Half Slab Construction Documentation

Production Process


Erection : Preparation Process


Erection : Moving Process


Erection : Intallation Process


Erection : Time Back Process


Topping : Preparation Process


Topping : Wire Mesh Installation


Topping : Preparation Concrete Pouring


Topping : Concrete Pouring

Safety, Health & Environment Provide personal safety tools such as hats, shoes,

work clothes, etc. for workers and guests. Provide safety facilities such as barrier for holes,

signs, railings, etc. Provide fire extinguishers for emergency situation. Provide first aid include auxiliary equipment,

medicines, etc. Keep the project clean by provide trash,

periodically dispose off the project, etc.

Quality Control

Check on the tensile strength of steel every material. Examination of rebar installation before casting. Testing slump value of concrete before casting. Testing the value of concrete compressive strength

test every concrete mixer came to the project site. 4 cylinder concrete mold every 1 concrete mixer 1 concrete mixer has a volume 7 m2 and 9 m2.

All activities related to concrete casting is controlled. Check every concrete curing process. Physical inspection of the finished concrete.

Half Slab Price Comparison

Unit Price Analysis

Price Per Component Analysis

Half Slab Method Conventional Method

Topping Analysis

Total Price Analysis

Unit Price Analysis

Unit Indeks Price Material WorkMaterial Concrete m3 1,000 716.800Rp 716.800Rp

716.800Rp -Rp

Materials to Make Concrete 1 m3

Description

TotalSub-Total

716.800Rp

Unit Indeks Price Material WorkMaterial Wiremesh m2 1,000 43.200Rp 43.200Rp

43.200Rp -Rp Total

Rebar Installation 1 m2 Wiremesh M6Description

Sub-Total43.200Rp

Unit Price Analysis

Unit Indeks Price Material WorkPlate 10 cm m3 0,008 9.155Rp 73Rp Hollow Steel 50x50x3 Kg 9,394 9.155Rp 86.002Rp Kaso 5/7 m3 0,005 50.860Rp 254Rp Formwork Oil Liter 1,155 8.200Rp 9.471Rp Worker OH 0,007 45.000Rp 315Rp Carpenter OH 0,076 60.000Rp 4.560Rp Foreman OH 0,008 65.000Rp 520Rp Overseer OH 0,001 100.000Rp 100Rp

95.801Rp 5.495Rp Total

Make 1 m2 Formwork for Concrete Slab PrecastDescriptionMaterial

Labor

Sub-Total101.296Rp

Unit Price Analysis

Unit Indeks Price Material WorkWorker OH 0,053 45.000Rp 2.385Rp Carpenter OH 0,018 60.000Rp 1.080Rp Overseer OH 0,005 100.000Rp 500Rp

-Rp 3.965Rp 3.965Rp

Installation Cost + Open Formwork 1 Unit Component for Precast Slab

Labor

Total

Description

Sub-Total

Unit Indeks Price Material WorkWorker OH 0,064 45.000Rp 2.880Rp Stonemason OH 0,244 60.000Rp 14.640Rp Vibrator Worker OH 0,128 60.000Rp 7.680Rp Foreman OH 0,034 65.000Rp 2.210Rp Overseer OH 0,073 100.000Rp 7.300Rp

-Rp 34.710Rp

Cost of Pouring Concrete 1 Unit Component for Precast Slab

Labor

Total

Description

Sub-Total34.710Rp

Unit Price Analysis

Unit Indeks Price Material WorkTower Crane Rental Unit/Day 0,067 250.000Rp 16.750Rp Solar Liter 6,676 9.000Rp 60.084Rp Crane Operator OH 0,067 100.000Rp 6.700Rp Worker OH 0,067 45.000Rp 3.015Rp Erection Worker OH 0,134 60.000Rp 8.040Rp Overseer OH 0,067 100.000Rp 6.700Rp

76.834Rp 24.455Rp

Installation / Erection 1 Unit Component for Precast Slab

Material

Labor

Total

Description

Sub-Total101.289Rp

Unit Price Analysis

Description Unit Volume Unit Price TotalConcrete m3 1 751.510Rp 751.510Rp Wiremesh Installation m2 20 43.200Rp 864.000Rp Pouring Concrete m3 1 34.710Rp 34.710Rp

1.650.220Rp

Concrete Topping 1 m3

Total Price

Half Slab Unit Price

Calculate cost of 1 unit production concrete component.

Concrete (m3) Pouring Concrete (unit) Wire Mesh Installation (m2) Formwork Production (m2) Formwork Installation (unit)

The calculation according the volume of floor plate.

Half Slab Unit Price

Example : Half Slab S1

Description Unit Volume Unit Price TotalConcrete m3 0,6314 716.800Rp 452.587,52Rp Pouring Concrete buah 1 34.710Rp 34.710,00Rp Wiremesh m2 18,04 43.200Rp 779.328,00Rp Formwork Production m2 0,903 106.791Rp 96.431,92Rp Formwork Installation buah 1 3.965Rp 3.965,00Rp

1.367.022,44Rp

Pekerjaan Produksi 1 Buah Komponen Beton Plat Lantai S1

Total

Conventional Unit Price

Example : Part S1

Description Unit Volume Unit Price TotalConcrete m3 1,0824 716.800Rp 775.864,32Rp Poruing Concrete buah 1 34.710Rp 34.710,00Rp Wiremesh Installation m2 18,04 43.200Rp 779.328,00Rp

Formwork Production m2 10,568 106.791Rp 1.128.563,15Rp Formwork Installation buah 1 3.965Rp 3.965,00Rp

2.722.430,47Rp

Pekerjaan Produksi 1 Buah Komponen Beton Plat Lantai S1

Total

Half Slab PriceNo. Description Unit Quantity Unit Price Total1 Half Slab Concrete Component Production

Concrete Plate S1 Each 5 Rp 1.367.022,44 Rp 6.835.112,20 Concrete Plate S2 Each 8 Rp 1.490.199,46 Rp 11.921.595,65 Concrete Plate S3 Each 1 Rp 1.551.787,96 Rp 1.551.787,96 Concrete Plate S4 Each 2 Rp 1.397.816,69 Rp 2.795.633,39 Concrete Plate S5 Each 21 Rp 1.459.405,20 Rp 30.647.509,24 Concrete Plate S6 Each 9 Rp 1.798.142,00 Rp 16.183.277,99 Concrete Plate S7 Each 1 Rp 2.106.084,54 Rp 2.106.084,54 Concrete Plate S8 Each 8 Rp 2.381.378,15 Rp 19.051.025,22 Concrete Plate S9 Each 1 Rp 899.912,22 Rp 899.912,22 Concrete Plate S10 Each 1 Rp 2.266.672,48 Rp 2.266.672,48 Concrete Plate S11 Each 2 Rp 1.463.732,78 Rp 2.927.465,56 Concrete Plate S12 Each 1 Rp 899.912,22 Rp 899.912,22 Concrete Plate S13 Each 3 Rp 1.166.457,70 Rp 3.499.373,11 Concrete Plate S14 Each 1 Rp 1.213.051,17 Rp 1.213.051,17 Concrete Plate S15 Each 1 Rp 507.576,45 Rp 507.576,45 Concrete Plate S16 Each 1 Rp 419.233,37 Rp 419.233,37 Concrete Plate S17 Each 1 Rp 999.278,46 Rp 999.278,46 Concrete Plate S18 Each 1 Rp 930.519,72 Rp 930.519,72 Concrete Plate S19 Each 1 Rp 804.776,82 Rp 804.776,82 Concrete Plate S20 Each 1 Rp 1.082.188,80 Rp 1.082.188,80

2 Half Slab Installation Each 70 Rp 101.289,00 Rp 7.090.230,00

3 Toping Concrete Work m3 35,796 Rp 1.650.220,00 Rp 59.071.275,12 Total Price Rp 173.703.491,69

Conventional Unit PriceNo. Description Unit Quantity Unit Price Total

1 Concrete Plate S1 Each 5 Rp 2.722.430,47 Rp 13.612.152,33 2 Concrete Plate S2 Each 8 Rp 2.973.258,23 Rp 23.786.065,84 3 Concrete Plate S3 Each 1 Rp 3.098.672,11 Rp 3.098.672,11 4 Concrete Plate S4 Each 2 Rp 2.785.137,41 Rp 5.570.274,81 5 Concrete Plate S5 Each 21 Rp 2.910.551,29 Rp 61.121.577,06 6 Concrete Plate S6 Each 9 Rp 3.600.327,64 Rp 32.402.948,76 7 Concrete Plate S7 Each 1 Rp 4.227.397,05 Rp 4.227.397,05 8 Concrete Plate S8 Each 8 Rp 4.787.227,78 Rp 38.297.822,27 9 Concrete Plate S9 Each 1 Rp 1.775.397,43 Rp 1.775.397,43 10 Concrete Plate S10 Each 1 Rp 4.553.964,98 Rp 4.553.964,98 11 Concrete Plate S11 Each 2 Rp 2.921.125,34 Rp 5.842.250,68 12 Concrete Plate S12 Each 1 Rp 1.775.397,43 Rp 1.775.397,43 13 Concrete Plate S13 Each 3 Rp 2.316.850,64 Rp 6.950.551,92 14 Concrete Plate S14 Each 1 Rp 2.408.895,76 Rp 2.408.895,76 15 Concrete Plate S15 Each 1 Rp 973.283,74 Rp 973.283,74 16 Concrete Plate S16 Each 1 Rp 795.074,39 Rp 795.074,39 17 Concrete Plate S17 Each 1 Rp 1.967.432,54 Rp 1.967.432,54 18 Concrete Plate S18 Each 1 Rp 1.827.360,31 Rp 1.827.360,31 19 Concrete Plate S19 Each 1 Rp 1.573.260,81 Rp 1.573.260,81 20 Concrete Plate S20 Each 1 Rp 2.135.201,71 Rp 2.135.201,71

Total Price Rp 214.694.981,91

Half Slab Price Comparison

Calculation of Price Efficiency

Conclusion

All members of the organization do the work according to the position.

Construction project use the half slab method because the cost more efficient.

During the construction period in the field, quality assurance looks very good.

From the analysis, concrete plate with half slab method is more efficient until 19,091% than convetional price.

Recomendation

Quantity of workers must be calculated correctly. Use safety straps should be done when working

on the high level. Ban on smoking at work must be done properly. Perform a quality selection of tower crane. Addition of tower crane because the project has

reached a high level. Because half slab method is more efficient than

conventional method, then this method can be an alternative in future projects.

Thank YouBayu Pinasthika (1200960234)

Friska Oktaviana (1200986681)

analysis of half slab

Documents