2014 GRAND DESIGN REFLECTION 337RLS Structurebody Problems

WHILE CAMPING WITH THIS 5TH WHEEL CAMPER, UPON INSPECTION OF WHY THE FENDERS WERE VIBRATING SO MUCH WHILE TRAVELING DOWN THE HIGHWAY, TWO OF THE BRACES WERE BROKEN AND READY TO FALL OFF. SINCE THEN I INSPECT THESE BRACES BECAUSE I DON'T WANT TO CAUSE AN ACCIDENT BY ONE BREAKING OFF AND HITTING A CAR ON THE HIGHWAY. I HAVE HAD ANOTHER OCCURRENCE WITH A BRACKET BREAKING OFF. I MENTIONED THE BRACKETS BREAKING ON A VISIT TO A DEALER. HIS REPLY WAS WE HAVE TO FIX THESE MANY TIMES. THIS SEEMS VERY UNSAFE TO HAVE THE BRACKET BREAKING OFF AND POSSIBLY HITTING A VEHICLE ON THE ROAD. THE BRACKETS DON'T BREAK OFF IN THE DRIVEWAY.THE BRACKET IS STEEL, SHAPED LIKE A "Z", DIMENSIONS OF ABOUT 14 INCHES X 1 INCH BY ABOUT 1/8 INCH THICK. AT THE BOTTOM A SELF TAPPING SCREW IS SCREWED THROUGH THE FENDER TO THE BRACKET...