The 12 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 309 open height m 285 rungstreads 12 material aluminium usage type heavy duty warranty 5 year standard bs 2037 class 1 platform height m 293 open depth m 186 weight kg 14