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ALTO Access Products |
Lakeside Industries Ltd
3T Method Explained
The “3T” or “through the trapdoor” method is one of the two permitted ways of assembling a tower without
the assembler being at risk of falling. This tower is a 3T tower.
Signage
The following information shall be prominently displayed at the base of the assembled tower:
The maximum number of working platforms
One
The maximum number of persons permitted on the working
platforms
2 persons per platform
The maximum number of persons permitted on the tower during
assembly and dismantling
2 persons per platform
The maximum safe working load on working platforms
282kg per platform unit
The maximum safe working load of the tower
282kg per platform unit
The load class of the tower
Class 3
Step 1:
As each new level of platform is installed, the operative
takes up a working position in the trap door of the
platform, standing on the ladder and leaning back against
the edge of the trapdoor aperture.
Step 2:
From this position the operative fits the horizontal braces
500mm and 1000 mm above the platform level (i.e. on
the first and third available rungs). If the far end of the
guardrail braces don’t fully engage when they are put in
place, the operative fully engages it when first climbing up
onto the platform. This process ensures that operatives
never have to stand on an unguarded platform.
