3″ X 3″ Straight Crossmember Aluminum 82″ 4 1/2″ Aluminum I Beam has been added to your order form. Checkout View Order Form $133.95 Any Crossmember Over 82″ Long. 3" X 3" Straight Crossmember Aluminum 82" quantity Add To Order Form SKU: 4815 Category: Crossmembers Related products 5 1/2″ Aluminum I Beam $23.95 Part #:216 Sold By The Foot. Add To Order Form 6 1/2″ Aluminum I Beam $26.95 Part #:217 Sold By The Foot. Add To Order Form 10″ Aluminum I Beam $76.95 Part #:4812 Sold By The Foot. Add To Order Form 3″ X 3″ Straight Crossmember Aluminum 76″ $125.95 Part #:4427 Any Crossmember Over 76" Long. Add To Order Form