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)
CARA MENGHITUNG BERAT 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 Ø²
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 Ø²) x P x BJ
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 Ø² (m²) x Panjang (m') x 7.850 kg/m³
= 6.162,25 kg/m³ x Ø² (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
From sea to shining sea, or at least from one side of the Hudson to the other, politicians you have barely heard of are being accused of wrongdoing. There were so many court proceedings involving public officials on Monday that it was hard to keep up.
In Newark, two underlings of Gov. Chris Christie were arraigned on charges that they were in on the truly deranged plot to block traffic leading onto the George Washington Bridge.
Ten miles away, in Lower Manhattan, Dean G. Skelos, the leader of the New York State Senate, and his son, Adam B. Skelos, were arrested by the Federal Bureau of Investigation on accusations of far more conventional political larceny, involving a job with a sewer company for the son and commissions on title insurance and bond work.
The younger man managed to receive a 150 percent pay increase from the sewer company even though, as he said on tape, he “literally knew nothing about water or, you know, any of that stuff,” according to a criminal complaint the United States attorney’s office filed.
The success of Adam Skelos, 32, was attributed by prosecutors to his father’s influence as the leader of the Senate and as a potentate among state Republicans. The indictment can also be read as one of those unfailingly sad tales of a father who cannot stop indulging a grown son. The senator himself is not alleged to have profited from the schemes, except by being relieved of the burden of underwriting Adam.
The bridge traffic caper is its own species of crazy; what distinguishes the charges against the two Skeloses is the apparent absence of a survival instinct. It is one thing not to know anything about water or that stuff. More remarkable, if true, is the fact that the sewer machinations continued even after the former New York Assembly speaker, Sheldon Silver, was charged in January with taking bribes disguised as fees.
It was by then common gossip in political and news media circles that Senator Skelos, a Republican, the counterpart in the Senate to Mr. Silver, a Democrat, in the Assembly, could be next in line for the criminal dock. “Stay tuned,” the United States attorney, Preet Bharara said, leaving not much to the imagination.
Even though the cat had been unmistakably belled, Skelos father and son continued to talk about how to advance the interests of the sewer company, though the son did begin to use a burner cellphone, the kind people pay for in cash, with no traceable contracts.
That was indeed prudent, as prosecutors had been wiretapping the cellphones of both men. But it would seem that the burner was of limited value, because by then the prosecutors had managed to secure the help of a business executive who agreed to record calls with the Skeloses. It would further seem that the business executive was more attentive to the perils of pending investigations than the politician.
Through the end of the New York State budget negotiations in March, the hopes of the younger Skelos rested on his father’s ability to devise legislation that would benefit the sewer company. That did not pan out. But Senator Skelos did boast that he had haggled with Gov. Andrew M. Cuomo, a Democrat, in a successful effort to raise a $150 million allocation for Long Island to $550 million, for what the budget called “transformative economic development projects.” It included money for the kind of work done by the sewer company.
The lawyer for Adam Skelos said he was not guilty and would win in court. Senator Skelos issued a ringing declaration that he was unequivocally innocent.
THIS was also the approach taken in New Jersey by Bill Baroni, a man of great presence and eloquence who stopped outside the federal courthouse to note that he had taken risks as a Republican by bucking his party to support paid family leave, medical marijuana and marriage equality. “I would never risk my career, my job, my reputation for something like this,” Mr. Baroni said. “I am an innocent man.”
The lawyer for his co-defendant, Bridget Anne Kelly, the former deputy chief of staff to Mr. Christie, a Republican, said that she would strongly rebut the charges.
Perhaps they had nothing to do with the lane closings. But neither Mr. Baroni nor Ms. Kelly addressed the question of why they did not return repeated calls from the mayor of Fort Lee, N.J., begging them to stop the traffic tie-ups, over three days.
That silence was a low moment. But perhaps New York hit bottom faster. Senator Skelos, the prosecutors charged, arranged to meet Long Island politicians at the wake of Wenjian Liu, a New York City police officer shot dead in December, to press for payments to the company employing his son.
Sometimes it seems as though for some people, the only thing to be ashamed of is shame itself. Finding Scandal in New York and New Jersey, but No Shame