136059 ⎘
Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings , e.g. by assembling; Lining predominantly with metal Longitudinal struts, i.e. longitudinal connections between adjoining arches
RIB FOR SUPPORTING AND CONSOLIDATING AN EXCAVATION AND METHOD FOR INSTALLING A STRUCTURE TO SUPPORT AND CONSOLIDATE AN EXCAVATION
#2Rib for supporting and reinforcing an excavation
#3Impact resistant lagging, method for designing impact resistant lagging, and apparatus for testing impact resistant lagging