Drain pipes, not of metal; Glass tiles; Gutters, not of metal; Non-metal partitions for building; Non-metal safety doors; Scaffolding of wood; Sewer pipes, not of metal; Shutters, not of metal; Staircases, not of metal; Window frames, not of metal; Wooden floor boards

'board':46 'build':17 'door':22 'drain':1 'floor':45 'frame':40 'glass':6 'gutter':8 'metal':5,11,14,20,30,34,38,43 'non':13,19 'non-met':12,18 'partit':15 'pipe':2,27 'safeti':21 'scaffold':23 'sewer':26 'shutter':31 'staircas':35 'tile':7 'window':39 'wood':25 'wooden':44

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