The 3 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 077 open height m 071 rungstreads 3 material aluminium usage type heavy duty warranty 5 year standard bs 2037 class 1 platform height m 074 open depth m 054 weight kg 3 please note number of treads includes the top platform the i