DAFTAR ISI Halaman Judul ................................................................................................................ i Surat Tugas Magang ...................................................................................................... ii Lembar Pengesahan Pembimbing Magang ................................................................... iii Lembar Pengesahan Pendadaran ....................................................................................... iv Lembar Pengesahan Dari Perusahaan .............................................................................. v Prakata ............................................................................................................................. vi Daftar Isi .......................................................................................................................... viii Daftar Gambar ................................................................................................................ xi Daftar Tabel ..................................................................................................................... xiii Daftar grafik .................................................................................................................... xiv Daftar Lampiran ............................................................................................................. xv Intisari .............................................................................................................................. xvi I. PENDAHULUAN A. Latar Belakang .................................................................................................... 1 B. Tujuan .................................................................................................................. 1 C. Batasan Masalah ................................................................................................. 2 D. Metodologi Penyusunan Laporan ................................................................... 2 E. Sistematika Penulisan ........................................................................................ 3
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II. PROFIL PERUSAHAAN A. Profil dan Sejarah Singkat Perusahaan ........................................................... 6 B. Visi Dan Misi Perusahaan .................................................................................... 7 C. Struktur Organisasi Proyek .............................................................................. 8 D. Sub Kontraktor .................................................................................................... 11
III. LANDASAN TEORI A. Pengertian Bekisting Secara Umum ................................................................ 13 B. Pengertian Bekisting Konvensional ................................................................... 13 C. Bekisting Vertikal dan Horizontal ................................................................... 15 D. Syarat Bekisting ................................................................................................... 16 E. Bagian-bagian Bekisting Horizontal................................................................. 18 F. Dasar Perhitungan Bentang Maximal .............................................................. 27 G. Pembongkaran Bekisting .................................................................................. 28
IV. PELAKSANAAN MAGANG DAN PEMBAHASAN I. Pelaksanaan Magang ........................................................................................ 29 A. Lokasi Proyek ................................................................................................ 29 B. Spesifikasi Gedung ..................................................................................... 30 C. Instansi yang Terlibat .................................................................................. 31 D. Latar Belakang Proyek ................................................................................ 31 E. Kegiatan Magang ......................................................................................... 32 a. Drafter ..................................................................................................... 32 b. Logistik ................................................................................................... 35 c. Asisten Pelaksana .................................................................................. 35 ix
d. Monitoring Kualitas Beton .................................................................... 36
II. Pembahasan Materi Laporan .......................................................................... 40 A. Perhitungan Bentang Maximal Material Kayu ........................................ 43 B. Penentuan Dimensi Scaffolding .................................................................. 62 C. Perhitungan Banyak Set scaffolding ........................................................... 64 D. Faktor Hancur Material Kayu .................................................................... 70 E. Perhitungan Kebutuhan Balok dan Multiplek ........................................ 73 F. Perhitungan Upah Tenaga ......................................................................... 74 G. Rekapitulasi Keseluruhan Biaya ................................................................ 76 H. Perhitungan Nilai Rupiah Material Sisa.................................................... 77 I.
Rencana Anggaran Biaya Sesuai SNI ........................................................ 78
J.
Faktor Efisiensi ............................................................................................. 80
V. KESIMPULAN DAN SARAN A. Kesimpulan ......................................................................................................... 82 B. Saran ..................................................................................................................... 82 DAFTAR PUSTAKA LAMPIRAN
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DAFTAR GAMBAR
Gambar 2.A.1.
Logo PT. Bhinneka Citra Prima .. .................................................. 7
Gambar 3.E.1.
Bagian-bagian scaffolding ............................................................... 18
Gambar 3.E.2.
Main frame ........................................................................................ 19
Gambar 3.E.3.
Cross brace ........................................................................................ 19
Gambar 3.E.4.
Jack base ............................................................................................. 20
Gambar 3.E.5.
U-head ............................................................................................... 20
Gambar 3.E.6.
Joint pen ............................................................................................. 20
Gambar 3.E.7
Horizontal frame ................................................................................ 21
Gambar 3.E.8.
Walking frame .................................................................................... 21
Gambar 3.E.9.
Ladder frame ....................................................................................... 22
Gambar 3.E.10.
Clamp ................................................................................................. 22
Gambar 3.E.11.
Caster Wheel....................................................................................... 22
Gambar 3.E.12.
Stair .................................................................................................... 23
Gambar 3.E.13.
Tiang support .................................................................................... 24
Gambar 3.E.14.
Rangka bekisting balok dan plat .................................................. 25
Gambar 3.E.15.
Balok pikul........................................................................................ 25
Gambar 3.E.16.
Balok landasan ................................................................................ 25
Gambar 3.E.17.
Balok pengaku ................................................................................ 25
Gambar 3.E.18.
Balok dinding panjang dan pendek ............................................. 26
Gambar 3.E.19.
Dinding multiplek .......................................................................... 26
Gambar 3.E.20.
Balok pikul plat ............................................................................... 26
Gambar 3.E.21.
Balok landasan plat ......................................................................... 27
Gambar 3.E.22
Dinding multiplek .......................................................................... 27
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Gambar 4.I.A.1.
Peta lokasi proyek .......................................................................... 29
Gambar 4.I.E.1.
Uji tekan beton ................................................................................. 36
Gambar 4.I.E.2.
Satu set alat Hammer test ................................................................ 38
Gambar 4.I.E.3.
Pembersihan lokasi uji ................................................................... 38
Gambar 4.I.E.4.
Pemngujian Hammer ....................................................................... 39
Gambar 4.I.E.5.
Data hammer test .............................................................................. 39
Gambar 4.I.E.6.
Konversi Data .................................................................................. 39
Gambar 4.II.1.
Bekisting konvensional dari kayu ................................................ 40
Gambar 4.II.2.
Denah balok dan plat lantai 1, 2, & 3 ........................................... 41
Gambar 4.II.3.
Potongan untuk melihatkan elevasi ............................................ 42
Gambar 4.II.4.
Gambaran hasil gedung simulasi .................................................. 42
Gambar 4.II.A.1.
Kayu glugu ................................................................................... 43
Gambar 4.II.A.2.
Bentang multiplek ....................................................................... 49
Gambar 4.II.A.3.
Bentang balok landasan plat ...................................................... 54
Gambar 4.II.A.4. Bentang balok penumpu .................................................................. 58 Gambar 4.II.B.1.
Main frame yang digunakan .......................................................... 64
Gambar 4.II.C.1. Formasi scaffolding lantai 1, 2, & 3 ................................................ 65 Gambar 4.II.C.2. Scaffolding lantai 1 untuk lantai 3 ................................................. 66 Gambar 4.II.C.3. Perletakan tiang support ................................................................. 67 Gambar 4.II.C.4. Awal penggunaan scaffolding ........................................................ 68 Gambar 4.II.C.5. Standar pelepasan bekisting ......................................................... 69
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DAFTAR TABEL
Tabel 2.A.1.
Tabel personalia .. ............................................................................ 8
Tabel 4.II.A.1.
Rekap kuat kayu Glugu .. ............................................................... 46
Tabel 4.II.A.2
Tabel kuat kayu Sengon ................................................................. 49
Tabel 4.II.C.1.
Time schedule pekerjaan beton .. ..................................................... 69
Tabel 4.II.C.2.
Rekapitulasi biaya scaffolding .. ...................................................... 70
Tabel 4.II.D.1.
Kebutuhan kayu lantai 1 dan 2 .. ................................................... 71
Tabel 4.II.D.2.
Realita kayu yang masuk proyek .. ............................................... 71
Tabel 4.II.D.3.
Konversi panjang per batang .. ...................................................... 72
Tabel 4.II.D.4.
Faktor hancur material kayu .. ....................................................... 72
Tabel 4.II.E.1.
Rekap kebutuhan material kayu .. ................................................ 74
Tabel 4.II.E.2.
Rekap kebutuhan material non kayu .. ........................................ 74
Tabel 4.II.F.1.
Perhitungan upah .. ......................................................................... 76
Tabel 4.II.G.1.
Rekap total RAP .............................................................................. 77
Tabel 4.II.H.1.
Perhitungan nilai rupiah material sisa ........................................ 78
Tabel 4.II.I.1.
Analisa harga satuan bekisting balok .. ........................................ 79
Tabel 4.II.I.2.
Analisa harga satuan bekisting plat .. ........................................... 79
Tabel 4.II.I.3.
RAB pekerjaan bekisting .. ............................................................. 80
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DAFTAR GRAFIK
Grafik 4.II.A.1.
Kuat tekan sejajar serat kayu glugu bagian tepi .. ...................... 44
Grafik 4.II.A.2.
Kuat tekan tegak lurus serat kayu glugu bagian tepi .. ............. 45
Grafik 4.II.A.3.
Kuat geser sejajar serat kayu glugu bagian tepi .. ....................... 45
Grafik 4.II.A.4.
Kuat lentur kayu glugu bagian tepi .. ........................................... 46
Grafik 4.II.A.5.
Kuat tekan sejajar serat kayu sengon .. ......................................... 47
Grafik 4.II.A.6.
Kuat tekan tegak lurus serat kayu sengon .. ................................ 47
Grafik 4.II.A.7.
Kuat geser kayu sengon ................................................................ 48
Grafik 4.II.A.8.
Kuat lentur kayu sengon .. ............................................................. 48
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DAFTAR LAMPIRAN
Lampiran 1
Daftar hadir magang
Lampiran 2
Daftar material kayu bekisting balok dan plat proyek gedung kantor PT. Mitrais
Lampiran 3
Denah simulasi
Lampiran 4
Potongan simulasi
Lampiran 5
3D simulasi
Lampiran 6
Time schedule pekerjaan beton
Lampiran 7
Buigstad material kayu
Lampiran 8
Rekap kebutuhan material kayu
Lampiran 9
Perhitungan upah tenaga
Lampiran 10
Rencana Anggaran Pelaksanaan
Lampiran 11
Perhitungan nilai rupiah material sisa
Lampiran 12
Rencana Anggaran Biaya Simulasi
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