Nexus Viper Class B+

ron.dittmer wrote:

msmith1199 wrote:
I wasn’t concerned with the leaks as much as I was on what caused the damage. I’m not looking to buy that one anyway. Not sure how it could have got damaged in three different parts of the back end, without it showing some time of impact point. I told the guy I wouldn’t be worried at all if it was obvious collision damage, but that wasn’t so obvious.

One would hope they backed that rig into something that caused the damage. Cracks developed from simply driving the rig would be concerning. That would imply a lot of "flexing" of the house is occurring.

In that comparison video I shared higher up here, Phoenix pointed out that their competitor mounted the walls to the sides of the floor. The walls do not rest on the floor. They rest on the mounting hardware. That construction method could be the cause of excessive flexing of that back wall, creating those cracks.

It looks like the add on pieces were meant to look like a rear cap but the structural part to just a flat back panel attached to the side walls will a 90 degree angle. Sharp angles do not transition loads well around corners causing stress build up and the panels to flex and crack. A better design is a rear cap with radius corners that minimizes the transitional loads around the corners and puts the fasteners in shear rather than tension. Having said that you will sometimes see spider cracks in the gel coat in rear caps with a radius due to transitioning loads around the corners, so there is a lot of load transitioning from side walls to rear wall around 90 degree corners. The larger the corner radius the more efficient the joint is.