| Answer | Crossword Clue |
|---|---|
| REBAR | Rod used to strengthen concrete |
| REBAR | Rod used to reinforce concrete |
| rebar | steel bar or rod used to reinforce concrete |
| rebars | steel bar or rod used to reinforce concrete |
| PEEN | Hammer part used to strengthen metal |
| spiling | timber used to strengthen a tunnel |
| spile | timber used to strengthen a tunnel |
| spiled | timber used to strengthen a tunnel |
| TPLATE | Letter-shaped hardware used to strengthen joints |
| GUSSET | Metal plate used to strengthen a joist |
| patches | A piece of cloth or other material used to mend or strengthen a torn or weak point |
