Getting ready to install 4 point seat belt that John Morales uses and recommends as his DW and mine seem to have the same concerns. Flexsteel seats are mounted on a plywood pedestal with a drawer underneath. Current lap belts are mounted to angle iron across the rear side of the drawer enclosure. Not to concerned about them pulling thru the plywood but am concerned about the ENTIRE plywood pedestal coming loose in a serious front end crash and sending DW thru those huge windshields. Cannot really see a way around this without major overhaul of the pedestals so I can mount to some structural steel. Know if we hit a car it's going to go low. A semi etc, well maybe end of the line anyhow. Worried about going off the road for whatever reason and rollovers. Anyone tackled this before. Did a search but no luck.
Thanks
The shoulder belts should be mounted at ear level . The only place with structure for that would be a metal tube riser/frame piece , just behind the seat at the front cap joint. Cutting and installing nut serts may be a valid anchor point. May not- I have no idea..
Ideally that also have some sort of guidance method to keep them near the desired point of contact . If they move -they may break your neck at low impact levels. Using double should belts would be part of a solution.
Then you may have non compatible engineering issues with the seat breaking out of the floor at 20Gs and the shouldler system breaking loose at 50Gs . Again I have no idea at what point you make more issues than you solve. It's called engineering dominoes.
Like Mike says, not simple. Short of building a full roll cage around the front compartment, there's no good attachment points for shoulder belts.
Not to belittle your concerns, but we just buckle our seat belts, I drive sober and defensively, and we hope to attract good karma.