Bodywork to rollcage fastening

[1point7bar]

Can someone please tell me how to fasten a fairly flat composite panel (roof) to the top of the roll cage on a sports prototype, so that it is removeable.

FWIW The car is a modified Noble P4.

[Keithyboy]

Lugs welded to the roll cage to which you can bolt/fasten the panel?

[robmlufc]

rivnut type thing?

[PhillipM]

Lugs with rivnuts in.

Or, flanges welded onto cage and/or panel taped on with 3M VHB

Edited by PhillipM on Wednesday 18th July 22:50

[1point7bar]

To bolt it means drilling through and the bolt heads visible on the outside.

I could use button head bolts, but it would be neater if all the fasteners were inside the car.

Laminating a bracket onto the panel is my current favourite, but it would be difficult to get a pro looking finish.

[robmlufc]

Dzus fasteners on the inside maybe?

[PhillipM]

1point7bar said:

To bolt it means drilling through and the bolt heads visible on the outside.

I could use button head bolts, but it would be neater if all the fasteners were inside the car.

Laminating a bracket onto the panel is my current favourite, but it would be difficult to get a pro looking finish.

Use bond nuts on the inside of the panel that act as locating dowels into the lugs...

[1point7bar]

Stuck on with a two-part methacrylate adhesive.

Drilled brackets welded to cage and M6 k-nuts.

Could be a winner.

[PhillipM]

Bingo. Layer of light cloth over the top though, spread the stress a bit.

[1point7bar]

Does kevlar cloth fabric Satin Weave 175g with infusion resin sound about right?

If I cut patches off the roll, how do I make a hole in the middle without deforming the weave?

[PhillipM]

Punch.

[1point7bar]

Thanks for the help.