What is BS 1139 part 6?

This standard governs structures made from mobile access tower components in non-standard configurations - in other words anything other than a straight up and down tower. Examples of such structures would include:

Linked towers (also referred to as facade runs)

Towers incorporating bridges or high clearance frames

Cantilever towers

Towers built to over 12 metre platform height

These are advanced tower applications, and it is vital that anyone considering using a tower in such a form has a design approved by the manufacturer either as a "standard" variant or as a bespoke design.

This is because the loads on the towers in these applications can be considerably greater than in normal builds - with the exception of Alto HD towers none of the other towers currently available were designed from the outset to be able to be used for these structures.