umroh

Saat ini, banyak tersedia buku dan tabel yang berisi tentang berat besi beton dengan diameternya, dalam tabel tersebut berat besi beton dihitung tiap 1 (satu) meter panjang (kg/m), yang jadi pertanyaan, apakah tiap waktu kita mesti bawa itu tabel / buku ?? gak kan !!..keliatan gak profesional dech ( amatiran he..he..he)
Mengetahui berat besi beton sangat mutlak diperlukan, dalam analisa pengerjaan Beton, tingginya harga per m3 beton faktor penentunya adalah koefesien berat besi beton tiap m³ Beton dan harga satuan dasar besi beton / kg di pasaran.

Untuk proyek-proyek pemerintah yang ditenderkan biasanya sudah disediakan draft analisa pekerjaan beton di dokumen lelang. CEK ULANG !! APAKAH KOEFISIEN BOBOT BESI SESUAI DENGAN BOBOT REAL LAPANGAN ( Panitia kadang membuat analisa berdasarkan BOW tanpa merubah koefisien Bobot Besi Beton)
Ini ada cara menghitung berat besi beton tanpa tabel, tapi yang jelas masih pake hitungan (he..he..he )
Rumus yang sudah jadi :
Berat per m' (kg/m') = 0,006162 x ز
Berat per batang (kg) = 0,006162 x 12 m' (panjang besi asli, dipasaran gak nyampek 12 m cuma 11.7 untuk besi marking )
Asal rumus :
Dengan menggunakan pendekatan rumus volume tabung.
Volume tabung = (0,25 x 3,14 x ز) x P x BJ
Keterangan :
Ø = diameter besi beton
P = panjang besi beton
BJ = berat jenis besi beton (7.850 kg/m³)
Rumus ini disederhanakan, sehingga menjadi :
Volume = 0.25 x 3.14 x ز (m²) x Panjang (m') x 7.850 kg/m³
               = 6.162,25 kg/m³ x ز (m²) x Panjang (m')
Contoh Perhitungan :
Menghitung berat besi Ø 10 mm per m' :
>>10 mm = 0,01 m
Sehingga menjadi :
= 6.162,25 kg/m³ x 0,01² (m²)
= 0,616225 kg/m'
Untuk 1 lonjor besi Ø 10 :
asumsi panjang 1 lonjor = 12 m
= 0,616225 kg/m' x 12 m
= 7,3947 kg
Demikian Cara Menghitung Berat Besi Beton, semoga bermanfaat

CARA MENGHITUNG BERAT BESI BETON
Photo
 
Many bodies prepared for cremation last week in Kathmandu were of young men from Gongabu, a common stopover for Nepali migrant workers headed overseas. Credit Daniel Berehulak for The New York Times

KATHMANDU, Nepal — When the dense pillar of smoke from cremations by the Bagmati River was thinning late last week, the bodies were all coming from Gongabu, a common stopover for Nepali migrant workers headed overseas, and they were all of young men.

Hindu custom dictates that funeral pyres should be lighted by the oldest son of the deceased, but these men were too young to have sons, so they were burned by their brothers or fathers. Sukla Lal, a maize farmer, made a 14-hour journey by bus to retrieve the body of his 19-year-old son, who had been on his way to the Persian Gulf to work as a laborer.

“He wanted to live in the countryside, but he was compelled to leave by poverty,” Mr. Lal said, gazing ahead steadily as his son’s remains smoldered. “He told me, ‘You can live on your land, and I will come up with money, and we will have a happy family.’ ”

Weeks will pass before the authorities can give a complete accounting of who died in the April 25 earthquake, but it is already clear that Nepal cannot afford the losses. The countryside was largely stripped of its healthy young men even before the quake, as they migrated in great waves — 1,500 a day by some estimates — to work as laborers in India, Malaysia or one of the gulf nations, leaving many small communities populated only by elderly parents, women and children. Economists say that at some times of the year, one-quarter of Nepal’s population is working outside the country.

Nepal’s Young Men, Lost to Migration, Then a Quake

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