Invacare FDX User Manual

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The angle of the pelvic belt should be within the preferred zone of 

45 to 75 degrees to the horizontal OR within the optional zone of 
30 to 45 degrees to the horizontal.
Steeper side-view pelvic belt angles are especially important if the 
pelvic belt is intended to be used for postural support in addition 
to occupant restraint in a frontal crash. Steeper angles will 
reduce the tendency for a vertical gap to develop between the 
user and the belt due to compliance of seat cushions and belt 
movement, thereby reducing the tendency for the user to slip 
under the belt and for the belt to ride up on the soft abdomen 
during normal use
Steeper belt angles also reduce the tendency for upper-torso 
belts to pull the pelvic belt onto the abdomen during frontal 
impact loading.

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For this procedure, refer to FIGURE 4 on page 69.

Preferred Zone

Optional Zone