Our 650 Series steel-curtain roll-up door is engineered for extreme conditions 

Transform your building’s exterior and protect your assets with DBCI’s economically-efficient 650 Series steel-curtain roll-up door.


The 650 Series was engineered to protect and maintain building envelopes in extreme conditions without the heavy, weighted elements frequently required in commercial use.



  • 26-gauge galvanized, Grade E hard steel
  • 5/8″ ribbed corrugation
  • All latches accept double locks and 7/16″ shackles
  • Max opening size 10′ x 10′

Bottom Bar

  • 6063 – T6 aluminum extrusion 
  • 1 1/2″ x 1 1/2″ galvanized angles
  • Replaceable bulb astragal

Axle-Drum Assembly

  • 1 5/16″ O.D. steel axle, 14-gauge 
  • Utilizes 9 1/2″, 18-gauge drums
  • Oil-tempered, e-coated torsion springs, available in two springs upon request from 7′ to 10′ wide
  • Full-accessible springs for inspection and maintenance

Guide System

  • 18-gauge galvanized steel
  • Pre-punched holes for anchors, slide latch, bracket attachment and head-stop attachment
  • Polyethylene guide strips provide easy, quiet operation


  • 12-gauge head stops have slotted mounting holes for proper attachment
  • 14-gauge galvanized steel handles
  • 12-gauge tension bracket made for additional strength
  • Shielded radial bearings for smooth operation
  • Gear-driven tensioning bracket allows for smooth adjustment
  • 12-gauge bearing bracket on right side
  • Stainless steel standard latch


  • Top and side draft stop
  • Weatherizing Storage Door Curtains
  • Available in 24 colors, subject to availability and varying lead times

Minimum Clearance

  • For proper exterior door installation, a 1/2″ deep rain lip must be formed in the concrete slab extending a minimum of 3 1/2″ from the interior face of the jamb.