The 4 tread industrial swingback step is constructed from heavy duty channel section stiles with riveted treads this no nonsense aluminium platform step is a simple yet reliable performer for daily use in harsh environments closed height m 112 open height m 1 rungstreads 4 material aluminium usage type heavy duty warranty 5 year standard bs 2037 class 1 platform height m 098 open depth m 073 weight kg 4please note number of treads includes the top platform the image