The construction radical and the construction kanji are the same!

This kanji also means industry, which is what construction is, if you think about it. It's all part of the construction industry.

Every time a kanji uses the こう reading (there are a lot!), we'll use the character こういち. He's one of the people who started this website, so we'll do our best in the mnemonics to embarrass him as much as possible. Like this:

You see some construction in front of you. There, standing shirtless (only suspenders and a hard hat) is こういち, looking back at you.