Gentex HGU-56/P, Operation And Maintenance Instructions, Page: 11 / 86

2-2. SELECTING HELMET SIZE
Tools and Materials Required
• Carpenter’s combination square
• Ruler
•
Marker
• Wood block (2 inches by 4 inches by 8 inches)
• Adhesive-backed hook-and-pile fastener
1. Obtain a block of wood 2 inches thick by 4 inches wide by 8 inches long. Referring to
Figure 2-1 , attach an 8-inch strip of hook fastener to the entire length of the center of one of
the 4-inch-wide faces. Attach a 12-inch strip of pile fastener, running vertically, to a wall
(bottom of the strip approximately 5 feet 4 inches above the floor) so that the block can be
adjusted for the various heights of user’s heads.
2. Attach the block of wood to the wall at the height of the wearer’s head when the wearer is
standing.
(Continued on next page)
5
Figure 2-1. Prepared Wood Block
Hook fastener
8 inches
4 inches
2 inches
Proper fitting is essential to the functioning of the helmet, all of its components,
and, consequently, the safety of the wearer. Take as much time as necessary to fit
the helmet precisely. Use extreme care in taking measurements and checking fit.