Min. S curve radius min. S curve radius 50m min. curve radius (vertical) 1000m min. curve radius (horizontal) The maximum gradient of 100m line is 60 ‰ the minimum passing width of the windshield is min.gateway width 800mm and the minimum passing height of the windshield is min.gateway height 2020mm. The weight of the windshield is fire and smoke test againstdin5510-2 or BS6853. The noise attenuation levels are ≥ 30dB and the heat transfer coefficient & nbsp; 5.0w / (m2. K) air tightness decreased from 3600pa to 1350pa