**Safety Requirements for NHRA (Rollb…
https://www.truestreetcars.com/threads/safety-requirements-for-nhra-rollbar-rollcage-harness-etc.155/
The roll cage must be constructed of minimum 1 5/8 o.d.x.118 mild steel tubing, or 1 5/8 x.083 chrome moly tubing. The roll cage must be certified by NHRA every 3 years, and have a serialized sticker affixed prior to participation. The cage must be padded anywhere the driver's helmet may contact it while in the driving position. Roll Cages are required on convertibles running 6.99 or faster than 135mph, and on all cars running 6.99* or faster than 135mph. Full-bodied cars running between 6.40 and 6.99, with unaltered firewalls, floor and body (from firewall rearward - wheel tubes permitted) can compete with just a roll bar.
The roll cage must be constructed of minimum 1 5/8 o.d.x.118 mild steel tubing, or 1 5/8 x.083 chrome moly tubing.
The roll cage must be certified by NHRA every 3 years, and have a serialized sticker affixed prior to participation.
The cage must be padded anywhere the driver's helmet may contact it while in the driving position.
Roll Cages are required on convertibles running 6.99 or faster than 135mph, and on all cars running 6.99* or faster than 135mph.
Full-bodied cars running between 6.40 and 6.99, with unaltered firewalls, floor and body (from firewall rearward - wheel tubes permitted) can compete with just a roll bar.
DA: 100 PA: 33 MOZ Rank: 43