Pekerja boleh mengerjakan pekerjaan di ketinggian dengan syarat : Dipasang pijakan kaki dan penghalang yang cukup kuat atau semi permanen, dan mampu menahan beban jika pekerja terjatuh. Jika tidak memungkinkan dipasang pengaman seperti pada poin di atas, maka harus digunakan perancah atau scaffolding Jika tidak dapat digunakan perancah atau scaffolding, maka harus dikenakan alat pengaman […]
A girder bridge is a bridge that uses girders as the means of supporting its deck. The two most common types of modern steel girder bridge are plate and box. The term “girder” is often used interchangeably with “beam” in reference to bridge design. However, some authors define beam bridges slightly differently from girder bridges. […]
In 1876 Sampson Moore in England designed and supplied the first ever electric overhead crane, which was used to hoist guns at the Royal Arsenal in Woolwich, London.[1] Since that time Alliance Machine, now defunct, holds an AISE citation for one of the earliest cranes in the USA market. This crane was in service until approximately 1980, and is now in a […]
