Sabtu, 06 Juli 2013

CARA MUDAH MENGHITUNG PEMBESIAN

Perumusan praktis untuk menghitung berat besi

Secara umum perumusan untuk menghitung berat besi adalah :

Vb x Bjb = ….. Kg


dimana : 

Vb  = Volume besi (m3)
Bjb = Berat jenis besi = 7850 (kg/m3)


Contoh :

1. Pelat besi dengan ukuran (1m x 1m) dengan tebal pelat 1 mm, hitung beratnya?


berat besi = (1 x 1 x 0.001) m3 x 7850 kg/m3 = 7.85 kg
(Catatan : 1 mm = 0.001 m)


2. Base plate dengan ukuran (25 cm x 30cm) dengan tebal plat 12 mm, hitung beratnya?


berat base plate = (0.25 x 0.30 x 0.012) m3 x 7850 kg/m3 = 7.065 kg.


Contoh cara menghitung berat dari besi tulangan untuk beton :

Hitung berat besi tulangan diameter 16 dengan panjang 12 meter ?

luas penampang Ø16 = 1/4 (π) 
d2 
                              = 1/4(3.14)(0.016)2 = 0.00020096 m2

volume Ø16    = luas penampang x panjang batang 

                    = 0.00020096 m2 x 12 m = 0.002411 m3

berat besi Ø16 = Volume x 7850 kg/m3 

                      = 0.002411 m3 x 7850 kg/m3 = 18.93 kg

Cara cepat untuk menghitung berat dari besi tulangan :

Berat besi tulangan = 0.006165 x  d2 x L …(Kg)

dimana : 
d = diameter tulangan (mm)
L = panjang batang tulangan (m)


Hitung berat besi tulangan diameter 16 dengan panjang 12 meter ?

berat besi Ø16 = 0.006165 x 162 x 12 = 18.93 kg

4 komentar:

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