... devices 2) Easily installed,well rigidity and high carrying capacity Rail tackle1.The requirement of the suspender in welding machine: ... rails, when vertical rail load 800KG/m, horizontal rail load 500KG/m, the safe coefficient of the vertical and horizontal slide rails > 5 ... shall comply with GB6378-86 national standard, precisely processed, the rail joint shall be reliable, agile, the whole shall be ...