The 5 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 135 open height m 12 rungstreads 5 material aluminium usage type heavy duty warranty 5 year standard bs 2037 class 1 platform height m 122 open depth m 09 weight kg 5please note number of treads includes the top platform the imag