Engineered specifically for each floor planFully welded outriggersCambered for added structural supportExtra support cross membersElectric slide out systemExpress ConstructionWelded aluminum framed sidewallsLaminated gel-coated filon exterior wallsHigh density bead foam insulation in sidewalls (R-7 insulation)Laminated aluminum framed floor 2'' thickOne piece breathable Darco protective wrapR-11 floor insulationStamped galvanized 5'' thick crowned raftersOne piece seamless rubber roofR-11 ceiling insulationExpress ExteriorInsulated lockable radius baggage doors with hold backsInsulated radius entrance door with screen doorDouble entry steps at main door