Related by context. Frequent words. (Click for all words.) 58 gusset plates 57 gussets 48 steel trusses 47 Interstate #W bridge 46 steel beams 46 Rosenker 46 #W bridge 45 steel reinforcement 45 NTSB 45 steel truss 44 trusses 44 pedal entrapment 43 roof trusses 43 horizontal stabilizer 43 antilock brake system 43 concrete piers 42 fasteners 42 structural 42 fatigue cracks 42 Safety Bureau ATSB 41 member Debbie Hersman 41 Chairman Mark Rosenker 41 structural integrity 41 Transportation Safety 41 Big Dig tunnel 41 Big Dig tunnels 41 rivets 40 allowing combustible dust 40 Mark Rosenker 40 Modern Continental 40 wing flaps 40 chairman Mark Rosenker 39 sticky accelerator pedals 39 Metrodome roof 39 gusset 39 door latches 39 slurry wall 39 #W bridge collapse 39 landing gear 39 Big Dig highway 39 Sumwalt 39 sticky pedals 39 accelerator pedals 39 rotting wood 38 fuselage 38 truss bridge 38 spokesman Ted Lopatkiewicz 38 unwanted acceleration 38 Robert Sumwalt 38 combustible dust 38 connector tunnel 38 welds 38 starter Kyle Lohse 38 girders 38 IOSHA 38 steel girders 37 fireproofing 37 thrust reverser 37 unintended acceleration 37 airworthiness directive 37 Bridge Collapse 37 Progressive Contractors 37 shims 37 corrosion 37 floor mats 37 subframe 37 floor joists 36 truss 36 Demand Determinants section 36 Interstate #W 36 bridge 36 sudden unintended acceleration 36 delamination 36 geotechnical 36 epoxy 36 member Robert Sumwalt 36 mechanical 36 Milena Del Valle 36 steel girder 36 member Kitty Higgins 36 Bartlit 36 insulating foam 36 thrust reversers 36 structurally deficient 36 crane 36 Structural engineers 36 electronic throttle 36 sudden acceleration 36 Safety Administration 36 deemed structurally deficient 36 structural soundness 36 manufacturability 36 vertical stabilizer 36 tread separation 36 steel coils 35 John Goglia 35 girder 35 NTSB investigator 35 bassinets 35 Pitots 35 wiring harness