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Open Track Racing
Pictures of Autopower Roll Bar?
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<blockquote data-quote="David Hester" data-source="post: 9115965" data-attributes="member: 6794"><p>the failure pictured was sort of a fluke, as the car was body slammed right on the roof- Not the same as a rollover, but illustrates you can't forsee all possible crashes. That being said, the AutoPower pads could be much larger.</p><p>SCCA states </p><p>GCR - 93</p><p>9. Cars and Equipment</p><p>General</p><p><span style="color: Orange">mounting plates</span> not be less than .080 inches thick nor more than 0.25</p><p>inches thick. <span style="color: Yellow">note too thick and you end up with a punch. The base becomes a die punch. Great for making louvers, not so good as spreading the load. </span><em><strong>The maximum area of each mounting plate in</strong></em></p><p><em><strong>the American Sedan, Improved Touring, Showroom Stock,</strong></em></p><p><em><strong>Spec Miata, and Touring classes shall be 144 square</strong></em></p><p><em><strong>inches. Plates may be on multiple planes but shall not be</strong></em></p><p><em><strong>greater than fifteen inches on any side.</strong></em></p><p><em><strong>b. The thickness of mounting plates bolted or riveted to the</strong></em></p><p><em><strong>structure of the car must not be less than the thickness of</strong></em></p><p><em><strong>the roll hoop or brace that they attach to the chassis, and</strong></em></p><p><em><strong>must be backed up with a plate of equal size and thickness</strong></em></p><p><em><strong>on the opposite side of the chassis panel. Mounting plates</strong></em></p><p><em><strong>shall not be more than 0.25 inches thick. The maximum</strong></em></p><p><em><strong>area of each mounting plate must be 144 square inches.</strong></em></p><p><em><strong>Plates may be on multiple planes but shall not be greater</strong></em></p><p><em><strong>than fifteen inches on any side.</strong></em></p><p><em><strong>c. Fasteners for bolted or riveted mounting plates must be</strong></em></p><p><em><strong>Grade 5 or better with a minimum diameter of 5/16”.</strong></em></p><p></p><p> Not sure just bolting sheet metal is going to do much. If you can bend it with your hands... well.</p><p>Moving on.</p><p>Welding would be better than bolting, the vertical attachment is a great idea. That being said, I had larger pads welded to the AutoPower cage pads I had years ago. There's a picture of the results of 65-70 mph headon crash into a pole somewhere on here.</p><p>Even with larger, welded pads, the passenger side firewall bar punched through the floorboard. Of cours, the body was rippled all the way back to the c-pillar. Still Auto Power cage did it's job and I thank them.</p><p>I've seen AutoPower cages with 8 attachments handle a hard roof impact no problem. Again, you pays your money and takes your chances.</p><p></p><p>4 point, add extra plates in the floor board.</p></blockquote><p></p>
[QUOTE="David Hester, post: 9115965, member: 6794"] the failure pictured was sort of a fluke, as the car was body slammed right on the roof- Not the same as a rollover, but illustrates you can't forsee all possible crashes. That being said, the AutoPower pads could be much larger. SCCA states GCR - 93 9. Cars and Equipment General [COLOR="Orange"]mounting plates[/COLOR] not be less than .080 inches thick nor more than 0.25 inches thick. [COLOR="Yellow"]note too thick and you end up with a punch. The base becomes a die punch. Great for making louvers, not so good as spreading the load. [/COLOR][I][B]The maximum area of each mounting plate in the American Sedan, Improved Touring, Showroom Stock, Spec Miata, and Touring classes shall be 144 square inches. Plates may be on multiple planes but shall not be greater than fifteen inches on any side. b. The thickness of mounting plates bolted or riveted to the structure of the car must not be less than the thickness of the roll hoop or brace that they attach to the chassis, and must be backed up with a plate of equal size and thickness on the opposite side of the chassis panel. Mounting plates shall not be more than 0.25 inches thick. The maximum area of each mounting plate must be 144 square inches. Plates may be on multiple planes but shall not be greater than fifteen inches on any side. c. Fasteners for bolted or riveted mounting plates must be Grade 5 or better with a minimum diameter of 5/16”.[/B][/I] Not sure just bolting sheet metal is going to do much. If you can bend it with your hands... well. Moving on. Welding would be better than bolting, the vertical attachment is a great idea. That being said, I had larger pads welded to the AutoPower cage pads I had years ago. There's a picture of the results of 65-70 mph headon crash into a pole somewhere on here. Even with larger, welded pads, the passenger side firewall bar punched through the floorboard. Of cours, the body was rippled all the way back to the c-pillar. Still Auto Power cage did it's job and I thank them. I've seen AutoPower cages with 8 attachments handle a hard roof impact no problem. Again, you pays your money and takes your chances. 4 point, add extra plates in the floor board. [/QUOTE]
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