Over and over, I see builders wondering how to install their belts correctly. Once upon a time that was a fair question, but in these days of the Interweb, there's no excuse for even asking. I can't help but get a little bugged, wondering, "Why don't they check the manufacturer's website?" Virtually every belt manufacturer has graphical instructions, so why not take their word for it instead of faceless advice off a forum? Note how the height of the shoulder straps is specified, which will depend upon your build and seat lay-back angle. It will dictate the height of the main rollhoop cross tube.
Here are some direct links to installation instructions from various manufacturers. I put Schroth first due to their very extensive instructions; I highly recommend reading through their documentation regardless which brand you actually buy.
Schroth http://www.schrothracing.com/sdocs/2009 ... ctions.pdf
Simpson http://simpsonraceproducts.com/safety-r ... positions/
Gforce http://simpsonraceproducts.com/safety-r ... positions/
Impact Racing... (was charged with issuing fake SFI stickers on some products, including belts.)
From the 2011 SCCA Rule Book:
HANSThe driver’s seat shall be a one-piece bucket-type seat and shall be
securely mounted. The back of the seat shall be firmly attached to the
main roll hoop, or its cross bracing, so as to provide aft and lateral support.
Seats homologated to and mounted in accordance with FIA standard
8855-1999, or FIA.Standard.8862-2009 or higher need not have
the seat back attached to the roll structure. Seats with a back not attached
to the main roll hoop or its cross bracing may not be mounted to
the stock runners unless they are the FIA homologated seats specified in
an FIA homologated race car. The homologation labels must be visible.
Seat supports shall be of the type listed on FIA technical list No.12 or
No. 40 (lateral, bottom, etc). Passenger seat back–if a folding seat, it
shall be securely bolted or strapped in place.
Mounting structures for racing seats may attach to the floor, cage
and or center tunnel. Seat mounting points forward of the main hoop,
between the center line of the car and the driver’s side door bar and
rearward of the front edge of the seat bottom are not considered cage
attachment points in classes with limitations on the number of attachments.
A system of head rest to prevent whiplash and rebound, and also to prevent
the driver’s head from striking the underside of the main hoop shall
be installed on all vehicles. Racing seats with integral headrests satisfy
The head rest on non-integral seats shall have a minimum area of 36
square inches and be padded with a minimum of one inch thick padding.
It is strongly recommended that padding meet SFI spec 45.2 or FIA
Sports Car Head Rest Material. The head rest shall be capable of withstanding
a force of two-hundred (200) lbs. in a rearward direction. The
head rest support shall be such that it continues rearward or upward
from the top edge in a way that the driver’s helmet can not hook over
HANS stands for Head And Neck Support. At one time, there was only one company selling the device and (I think) they called themselves HANS. But, like "Kleenex", several companies now make head and neck restraints:
The "R3" unit http://www.safetysolutionsracing.com/ra ... es/r3.html
Hybrid Pro Rage http://www.safetysolutionsracing.com/pr ... -rage.html