Related by context. Frequent words. (Click for all words.) 43 concrete slabs 43 oily residue 42 air conditioning ducts 42 steel beams 42 molten steel 41 steel girders 41 steel girder 40 honeycomb 40 plastic 40 granite slabs 40 molten metal 40 sheeting 40 outer shell 39 encased 39 silicone rubber 39 steel trusses 39 polymer 39 duct 39 pipework 39 ductwork 39 Plexiglass 38 airgel 38 fiberglass 38 scaffolding 38 tunnels dug 38 sheathing 38 microcapsules 38 honeycombed 38 manhole cover 38 casings 38 ship hull 38 silicone 38 corroded 38 gasket 38 sealant 37 molten iron 37 steel rods 37 vapor barrier 37 concrete piers 37 molten 37 reinforced concrete 37 masonry walls 37 pinholes 37 stone slabs 37 girders 37 rusted metal 37 adhesive tape 37 plaster 37 PVC piping 37 styrofoam 37 foam padding 37 outer layer 37 steel rebar 37 sarcophagus 37 hairline cracks 37 epoxy 37 protective coating 37 corrosion resistant 37 pipe 37 insulators 36 Tree limbs 36 manhole 36 bubble wrap 36 nylon 36 Encased 36 hermetically sealed 36 cladding 36 debris 36 coating 36 welds 36 crawlspace 36 waterproofed 36 sheet metal 36 manholes 36 slurry wall 36 cavity 36 ducting 36 Gore Tex 36 wood planks 36 rods 35 wires 35 steamer trunk 35 copper tubing 35 caissons 35 steel coils 35 gaskets 35 rotting wood 35 turbine blades 35 corrosion 35 shoe soles 35 waterproofing 35 undercarriages 35 piping 35 Big Dig tunnels 35 rotting 35 stainless steel 35 tunnels 35 pipes 35 copper wiring 35 Plexiglas 35 roofing shingles