V-Trak Backrest, User Manual, Page: 26 / 32

Backrest loading, stability and high tone – loading guidelines
Category 2
One piece backrest with secondary arm at
top or bottom to transfer rotational loads
directly to the canes.
Maximum User Weight: 120Kg
Category 3
One piece or segmented backrest with two
Central Mounting Assemblies at the
highest and lowest practical mounting
positions
Maximum User Weight: 140Kg
Category 4
Two separate segments with backrest
extension with precautionary raising of the
pivot point to its optimal or highest position
to resist rotational forces (inverted Central
Mount)
Maximum User Weight: 140Kg
Category 1
One-piece backrest using one Central
Mounting Assembly, with the pivot at the
optimal position to balance rotational loads.
Maximum User weight: 120Kg
The following guidelines are intended as a guide only and should not be used as a substitute
for professional judgement, opinion or experience. Each installation will be unique and will
require the issuer’s assessment of any risk and its management.
Figure 50
Figure 51
Figure 52
Figure 53