Hemco's Self Adjusting Stair gangway (SAS) provides safe access where there are numerous height differences in tanker trucks and railcars being serviced from the same elevated walkway. Standard models are available in 3 tread, 4 tread, 5 tread and 6 tread, each having the ability to reach out as far from the elevated walkway as needed. Longer stringers are available, but may require hydraulic assistance for ease of folding up and down.

SAS download pdf


After the Safety Securing Latch is released, a slight push out on the top of the gangways will drop the treads as they remain horizontal to meet the desired top of the truck at any height either above or below the elevated walkway. 

The internal balance mechanisms keep the gangway in perfect balance for effortless operation throughout the full range. To retract, simply pull on the pull chain located on the right side of the gangway. The balance mechanisms will gently raise it to the vertical. The Safety Securing Latch automatically latches when stair reaches the vertical position.

Standard Features:

  • Steel constructed gangway panels and stringer housings
  • Tread support bars rotate on factory sealed flange mount bearings
  • Treads are serrated non-slip grating
  • Rigid handrails and mid-rails while in any position
  • Rubber bumpers to stabilize and protect from scratches and dings
  • Factory set, heavily constructed tension spring balance mechanisms


The SAS gangways is easily installed on any structural loading rack. Bolt mounts to top or side of walkway. Factory installed and adjusted balance mechanisms - typically require no field adjustment. Shipped almost totally assembled - very little field assembly required.


  • The SAS gangway can be equipped with our standard of 4’ x 6’ U-Cage safety enclosure, or other sizes if requested
  • Air or hydraulic operation is available for non-standard, larger, custom size stair stringers 

Hemco proudly offers an industry leading 5-year warranty on our galvanized carbon steel products.

Hemco Industries has been producing high-quality gangways systems for over 50 years. We appreciate the opportunity to compete for your projects - receive a FREE quote on our SAS gangways by submitting our Request A Quote form. Please feel free to give us a call at 713-681-2426 or toll free at 877-394-3626.