trench sheeting trench sheets accessories piling guides trench lining systems introduction backhoe box manhole backhoe box light trenchbox standard trenchbox manhole box super trenchbox dragbox edge protection groundwork equipment hydraulic walers manhole brace shaftbrace tankbrace multibrace super shaftbrace 20m brace 'K' brace extensions bracing struts formwork/falsework system 160 soldier MkII soldier light panel formwork parapet support system scaffold refurbishment propping needling façade retention heavy propping other equipment manhole shutters manhole lifting pins air test stoppers gas detectors culvert puller trench struts adjustable props roadforms ladders temporary fencing road/walkway plates trench crossing units dura-BASE mats about us who we are the mabey group depots & works career opportunities service & support get in touch customer portal login products trench sheeting trench lining systems groundwork equipment formwork/falsework refurbishment other equipment ethics policy code of ethics      manhole shutters Adjustable Steel Manhole Shutters accommodate all standard sizes of manhole rings using a combination of 3 panel types: A, B, and C. Panel heights are 900mm and 1800mm.