Cara menghitung berat besi beton (polos): Diameter x Diameter x Panjang x 0,006165 (diameter dalam satuan milimeter, pa

Cara menghitung berat besi beton (polos):
Diameter x Diameter x Panjang x 0,006165

(diameter dalam satuan milimeter, panjang dalam satuan meter)

0,006165 dari:

3,14 / 4  x 7854 / 1000000

3,14 adalah PI
4 (hitung volume tabung atau luas lingkaran) karena yang dikuadratkan diameter, maka dibagi 2 kuadart = 4
7854 adalah berat jenis baja (kg per meter kubik)
1000000 karena diameternya dalam milimeter ke meter kuadrat (1000 kuadrat)


Besi beton polos tidak bisa benar-benar bulat, karena proses rolling mill memang karakternya seperti itu. Besi (baja) bulat hasil dari mesin bubut saja, ada toleransinya, apalagi hasil penggilingan. Untuk itu, biasanya, untuk mendapatkan diameter besi beton, diukur beberapa kali, dan hasilnya dirata-rata.

Cara menghitung besi beton polos tersebut tidak berlaku untuk menghitung berat besi ulir (sirip). Diameter dalam besi beton ulir tidak bisa biasanya tidak persis sama untuk hasil pada ukuran tertentu, karena tebal dan kedalaman ulirnya tidak sama, tergantung pembuatan matrasnya (calibernya).

Untuk menghitung berat besi kotak (nako / virkan):

Diameter x Diameter x Panjang x 0,007854

Angka (nilai) 0,007854 adalah berat jenis baja (kg per meter kubik) dibagi 1000000 karena diameternya dalam milimeter ke meter kuadrat (1000 kuadrat), Samsung baru saja telah mengungkapkan bahwa acara pers Unpacked berikutnya akan berlangsung di Barcelona pad, Samsung baru saja telah mengungkapkan bahwa acara pers Unpacked berikutnya akan berlangsung di Barcelona pada 24 Februari mendatang . Itu adalah hari pertama akan digelarnya Mobile World Congress (MWC) 2014.

Sebuah undangan pun juga telah disebar oleh Samsung dengan bertuliskan 'Unpacked 5'. Di masa lalu, perusahaan asal Korea Selatan ini juga telah mengumumkan smartphone Galaxy terbaru dalam ajang yang sama. Tentu tidak mustahil jika dalam acara MWC tersebut Samsung akan merilis Galaxy S5, seperti yang dilansir Phone Arena (3/2) kemarin.

Sebagai pemikat, Anda juga perlu tahu spesifikasi dan keunggulan apa yang telah ditawarkan oleh Galaxy S5 ini. Percayalah, itu akan dapat membuat Anda takjub.

Perangkat ini telah memiliki layar Quad HD berukuran 5,2inci dan resolusinya 1440x2560p. Kamera utamanya telah memiliki sensor 16MP, RAM 3GB, menyediakan memori 32GB-64GB-128GB. Sementara itu sistem operasi yang berjalan di dalamnya adalah Android 4.4 KitKat.

Untuk masalah harga, hingga masih belum dapat diketahui. Semoga sebelum acara perilisannya nanti, ada konfirmasi harga Samsung Galaxy S5. Tunggu saja kelanjutannya.

Editor : Dian Sukmawati

Mr. Alger, who served five terms from Texas, led Republican women in a confrontation with Lyndon B. Johnson that may have cost Richard M. Nixon the 1960 presidential election.

GREENWICH, Conn. — Mago is in the bedroom. You can go in.

The big man lies on a hospital bed with his bare feet scraping its bottom rail. His head is propped on a scarlet pillow, the left temple dented, the right side paralyzed. His dark hair is kept just long enough to conceal the scars.

The occasional sounds he makes are understood only by his wife, but he still has that punctuating left hand. In slow motion, the fingers curl and close. A thumbs-up greeting.

Hello, Mago.

This is Magomed Abdusalamov, 34, also known as the Russian Tyson, also known as Mago. He is a former heavyweight boxer who scored four knockouts and 14 technical knockouts in his first 18 professional fights. He preferred to stand between rounds. Sitting conveyed weakness.

But Mago lost his 19th fight, his big chance, at the packed Theater at Madison Square Garden in November 2013. His 19th decision, and his last.

Now here he is, in a small bedroom in a working-class neighborhood in Greenwich, in a modest house his family rents cheap from a devoted friend. The air-pressure machine for his mattress hums like an expectant crowd.


Mike Perez, left, and Magomed Abdusalamov during the fight in which Abdusalamov was injured. Credit Joe Camporeale/USA Today Sports, via Reuters


Today is like any other day, except for those days when he is hurried in crisis to the hospital. Every three hours during the night, his slight wife, Bakanay, 28, has risen to turn his 6-foot-3 body — 210 pounds of dead weight. It has to be done. Infections of the gaping bedsore above his tailbone have nearly killed him.

Then, with the help of a young caretaker, Baka has gotten two of their daughters off to elementary school and settled down the toddler. Yes, Mago and Baka are blessed with all girls, but they had also hoped for a son someday.

They feed Mago as they clean him; it’s easier that way. For breakfast, which comes with a side of crushed antiseizure pills, he likes oatmeal with a squirt of Hershey’s chocolate syrup. But even oatmeal must be puréed and fed to him by spoon.

He opens his mouth to indicate more, the way a baby does. But his paralysis has made everything a choking hazard. His water needs a stirring of powdered food thickener, and still he chokes — eh-eh-eh — as he tries to cough up what will not go down.


Mago used to drink only water. No alcohol. Not even soda. A sip of juice would be as far as he dared. Now even water betrays him.

With the caretaker’s help, Baka uses a washcloth and soap to clean his body and shampoo his hair. How handsome still, she has thought. Sometimes, in the night, she leaves the bedroom to watch old videos, just to hear again his voice in the fullness of life. She cries, wipes her eyes and returns, feigning happiness. Mago must never see her sad.


 Abdusalamov's hand being massaged. Credit Ángel Franco/The New York Times


When Baka finishes, Mago is cleanshaven and fresh down to his trimmed and filed toenails. “I want him to look good,” she says.

Theirs was an arranged Muslim marriage in Makhachkala, in the Russian republic of Dagestan. He was 23, she was 18 and their future hinged on boxing. Sometimes they would shadowbox in love, her David to his Goliath. You are so strong, he would tell her.

His father once told him he could either be a bandit or an athlete, but if he chose banditry, “I will kill you.” This paternal advice, Mago later told The Ventura County Reporter, “made it a very easy decision for me.”

Mago won against mediocre competition, in Moscow and Hollywood, Fla., in Las Vegas and Johnstown, Pa. He was knocked down only once, and even then, it surprised more than hurt. He scored a technical knockout in the next round.

It all led up to this: the undercard at the Garden, Mike Perez vs. Magomed Abdusalamov, 10 rounds, on HBO. A win, he believed, would improve his chances of taking on the heavyweight champion Wladimir Klitschko, who sat in the crowd of 4,600 with his fiancée, the actress Hayden Panettiere, watching.

Wearing black-and-red trunks and a green mouth guard, Mago went to work. But in the first round, a hard forearm to his left cheek rocked him. At the bell, he returned to his corner, and this time, he sat down. “I think it’s broken,” he repeatedly said in Russian.


Bakanay Abdusalamova, Abdusalamov's wife, and her injured husband and a masseur in the background. Credit Ángel Franco/The New York Times


Maybe at that point, somebody — the referee, the ringside doctors, his handlers — should have stopped the fight, under a guiding principle: better one punch too early than one punch too late. But the bloody trade of blows continued into the seventh, eighth, ninth, a hand and orbital bone broken, his face transforming.

Meanwhile, in the family’s apartment in Miami, Baka forced herself to watch the broadcast. She could see it in his swollen eyes. Something was off.

After the final round, Perez raised his tattooed arms in victory, and Mago wandered off in a fog. He had taken 312 punches in about 40 minutes, for a purse of $40,000.



In the locker room, doctors sutured a cut above Mago’s left eye and tested his cognitive abilities. He did not do well. The ambulance that waits in expectation at every fight was not summoned by boxing officials.

Blood was pooling in Mago’s cranial cavity as he left the Garden. He vomited on the pavement while his handlers flagged a taxi to St. Luke’s-Roosevelt Hospital. There, doctors induced a coma and removed part of his skull to drain fluids and ease the swelling.

Then came the stroke.


A championship belt belonging to Abdusalamov and a card from one of his daughters. Credit Ángel Franco/The New York Times


It is lunchtime now, and the aroma of puréed beef and potatoes lingers. So do the questions.

How will Mago and Baka pay the $2 million in medical bills they owe? What if their friend can no longer offer them this home? Will they win their lawsuits against the five ringside doctors, the referee, and a New York State boxing inspector? What about Mago’s future care?

Most of all: Is this it?

A napkin rests on Mago’s chest. As another spoonful of mush approaches, he opens his mouth, half-swallows, chokes, and coughs until it clears. Eh-eh-eh. Sometimes he turns bluish, but Baka never shows fear. Always happy for Mago.

Some days he is wheeled out for physical therapy or speech therapy. Today, two massage therapists come to knead his half-limp body like a pair of skilled corner men.

Soon, Mago will doze. Then his three daughters, ages 2, 6 and 9, will descend upon him to talk of their day. Not long ago, the oldest lugged his championship belt to school for a proud show-and-tell moment. Her classmates were amazed at the weight of it.

Then, tonight, there will be more puréed food and pulverized medication, more coughing, and more tender care from his wife, before sleep comes.

Goodbye, Mago.

He half-smiles, raises his one good hand, and forms a fist.

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