A girder is a support beam used in construction. It is the main horizontal support of a structure which supports smaller beams. Girders often have an I-beam cross section composed of two load-bearing flanges separated by a stabilizing web, but may also have a box shape, Z shape, or other forms. Girders are commonly used to build bridges.

A Chinese construction contractor CHEC has been constructing a new bridge over the Rio Minho River as a part of the May Pen to Williamsfield Toll Road Development Project. Work started in January 2021. I go past the site on foot once a week as a part of my exercise routine and have been taking photos of the works since February 2021. Some are highlighted in my post Mystery of the Secret Death and Burial of the Original Foundations.

Today I was able to see a girder being placed and took photographs. The process is quite interesting. I am not an engineer and could only interpret what I saw through layman eyes. The first photo is from earlier and shows the span of the river and the number of girders required. The unit placed today was in the section numbered 4.

Girder is away from the loading frame
Carriers which ride on tracks on top of the frame are positioned to grab the girder
In the meantime, the girder which is on a trolley, is pushed under the frame.
The leading edge of the girder is chained to the first carrier which lifts it clear of the trolley and drags it forward.
The girder is positioned under the frame.
The trailing end of the girder is chained to the second carrier which lifts it clear of the trolley and assists with moving the girder forward
The girder is carefully positioned.
And then lowered.

The operation appeared to be slow, but the girder was connected, moved and placed in 34 minutes.

Conliffe April 17, 2022.

About conliffews

First time blogger
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