Originally Posted by malthouse
The Ali floors are made up of rows of what amounts to tongue and groove slats, bound together into panels by a side runner. Each slat is extruded and is made of multiple box section, the whole assembly is very strong and light but a pig to modify.
If your alum floor panels are the standard ones to most Asian sibs as you describe them, then some alum slats are riveted to lateral side runner (joinner) you can not modify the fllor, but can reinforce it better. If your alum panel is factory riveted with just 8 rivets on each side per panel (white dots) and rest of slats are lying against rivetted ones, why not add on 4 rivets (red dots) to each alum slat. Complete each remaining 4/5 alum boards per sib.
Get yourself a nice electrical drill and 5 mm drilling, replace existing ones by 4.8 mm x 12 mm rivets, if your floor is very thick use 4.8 x 15 mm. This will give extra slat/side runner rigidity. Keep in mind that each alum slat not riveted will tend with heavy weight, mates, scuba gear equipment, center console or whatever on floor top, tend to slight arc/bend slats towards floor fabric. The only way to endure a horizontal floor is rivetting each alum slat. In my particular case have replaced 3.8/4.0 mm factory rivets by 4.8 x 12 mm better quality new rivets, now superb floor rigidity on each panel through out all floor extension.
Place good quality tape (3M) on total extension of each floor panel runner, drill hole, replace/put new rivets and apply a second tape same extension on top of all rivets, will protect better salt laying arounf floor fabric.
Depending on the slat wide, you could place just a central rivet, if wanting more heavy duty use/abuse apply 2 lateral rivets per slat. This rivetting add on can be applied to any sib floor, just get the right tools, drill machine and rivetting tool, don't but a cheapo asian rivetting machine, won't last one complete panel floor work, buy Stanley or equivalent good UK tool. As this reinforcement procedure involves lot of work, better have a nice cold beer while doing it. "Thums-Up" !! Happy Drilling & Rivetting.
Check pics for better understanding