My propane tank cover has a plyboard hard top and the sides is some kind of material which has a sewn in stretch rope to keep it tight. It just slips over the two tanks.
Being directly behind my truck bed it probably doesn't get alot of wind...
Have a lot of highway roads miles on it since 2009 and all is holding in place.
Roy Ken
My Posts are IMHO based on my experiences - Words in CAPS does not mean I am shouting
Roy - Carolyn
RETIRED DOAF/DON/DOD/CONTR RADIO TECH (42yrs)
K9PHT (Since 1957) 146.52M
2010 F150, 5.4,3:73 Gears,SCab
2008 Starcraft 14RT EU2000i GEN
2005 Flagstaff 8528RESS