[DaddyGlenn]

Originally Posted by kdjones2000

I just noticed that your diagonal main hoop support is not welded to the hoop itself, but to the base plate.

This is not going to pass inspection for Race in SCCA/NASA sanctioning bodies.

If it's just for playing around in HPDE / Time Trial, then you are good to go.

It is a Hanksville Hotrods cage that is supposed to be legal for NASA, SCCA, PCA. But you got me nervous so I looked up the rules.

Legal for NASA - NASA CCR:
15.6.7 Diagonal Brace
One(1) diagonal brace should be used in the same plane as the main hoop. The diagonal should be one continuous path;meaning that it must conform to Diagrams 15.6.7a or 15.6.7b. Note-If the installation method from Diagram 15.6.7b is used, the builder should pay close attention to alignment.One end of the diagonal brace shall attach to the corner, or horizontal part of the main hoop above the driver’s head, within twelve (12) inches of the driver’s-side corner. The other end of the diagonal brace shall attach to the mounting plate (or to the main hoop as close to the mounting plate as practically possible) diagonally opposed to the driver’s head (passenger floor).

Legal for SCCA - SCCA GCR:
2. Main Hoop Bracing
a. Main hoops shall incorporate a diagonal brace. The brace shall either be in the plane of the main hoop, or extend from the top of one rear brace (described in 9.4.B.2.c) to the bottom of the opposite rear brace. Automobiles with mid mounted engines can have the lower mounting point attach to the frame of the automobile within six inches of the main hoop. In the case of braces in the plane of the main hoop, the brace must span at least 50% of the width of the main hoop, and at least 75% of the height of the main hoop as shown in figure 12.

Legal for PCA - PCA Club Racing Rules:
Roll Cages: The roll cage must be securely mounted with the mounting plates at the bottom of the hoops mounted directly to the floor and/or longitudinal members of the unibody and make metal to metal contact. Any padding, carpet, upholstery, etc. must be removed to satisfy this requirement. The mounting area of bolt‐in roll cage must be backed by a plate of a size equal to that of the upper mounting plate with a minimum thickness of 3/16”. Bolts must be grade 5 or higher. The roll cage must be full cockpit width, except as originally supplied by the factory for open race cars and have two fore/aft tubing braces. The braces must be mounted as near to the top of the main hoop as possible at an included angle of at least 30 degrees. Also, the assembly must contain a diagonal (left to right side) tubing brace from one upper side of the main hoop to a floor or unibody lower frame mounting point of a bar member on the other side to obtain the strength benefits of triangulation. Roll cage bar tubing in the Stock/Prepared Classes must remain within the passenger compartment. The removal of the door glass to facilitate side impact protection is allowed. Carbon fiber roll cages are not allowed.