Scaffolding Knowledge

The device is named after one 'Arthur Crow,' a London-based lawyer who, in 1935, had lent credit to 24-year-old William Aphonse de Vigier . The Swiss-born inventor had left his ...

Acrow props come in five sizes – ranging from size 0 which extends from approximately 1050mm to 1800mm, right up to size 4, which extends up to 4900mm .

Props are auxiliary elements that support a horizontal formwork system and position it at the required height in each case

Common size configurations for jacks and plugs are 3.5mm, 2.5mm, and 6.35mm . The 3.5mm jack, in particular, is practically universal when it comes to headphones and audio gear ...

In order to make his product simple to spot at the beginning of alphabetical lists and easy to say, De Vigier named his product acrow props after his company solicitor Mr. A Crow.