INDUSTRY.co.id - Jakarta - In two consecutive months, Jakarta colored the level of building construction. Accidents were referred to the demolition of the 2nd Jakarta Stock Exchange Building, the collapse of the LRT project gear box at Kayu Putih, the collapse of the Pakubuwono Spring Apartments plant, and the collapse of the Double Double Track (DDT) girder box in Matraman, East Jakarta.

The accident of the flyover road construction is quite interesting. The millennium already know why this construction is prone to accidents? Here are some facts about the girder box like from various sources Sunday (4/2):

On the one hand, the sophistication of construction is easy. Box girder is a hollow concrete construction that is stronger than the shape of construction I or H. In the girder box, composed of steel, iron, aluminum, and pre-stressed concrete construction which is the maximum strengthBox girder is not new technology.

Civil engineering expert Sir William Fairbairn, with the help of a mathematician, Eaton Hodgkinson discovered the pattern of this girder box construction. They think of an efficient and powerful design. The girder box is a construction technology that has been used in the major constructions of the world.

One of the compliments is the construction of Britannia Bridge and Albert Bridge in England. The construction of the girder box is strong and quite heavy. Since this construction is used in large construction, girder boxes require special transport techniques to be constructed into solid construction according to.

Zeis Zultaqwa who once led the Pameuntasan Bridge project, Citarum River, in 2010, said there are several methods of girder installation techniques. At least, there are two ways that are often used.

First, launching with the installation tool of girder segmental installation per girder according to the size of the manufacturer. After construction rises, new wiring of the tendon is done.

Second, the manual method, the segmental merging is implemented below, including the connection of its prestress cable. Only then was lifted up using a crane.

"The second way is done in the DDT Matraman project," Zeis said. This construction accident became a multiplier victim. Research on the causes of accidents can take a while, due to various considerations. Lack of operator operators, equipment failure problems, and natural factors are the main factors of accidents.

For the case of construction failure in Kayu Putih, East Jakarta and Matraman, East Jakarta, it is still under investigation of the cause of the accident. Let's wait for the arrival of an expert.