架 (jià): shelf, frame; to fight; measure word for planes, etc.

The workers propped up the leaning wall with several thick wooden poles and then set up steel pipes underneath to prevent the house from collapsing.

That old bridge is made of stone supported on the cliffs on both sides; it's very deep below, and walking on it makes one a bit scared.

They set up a grape trellis in the backyard; in summer the grapevines cover the trellis, and the family often cools off underneath.

The mountainous area originally had no signal; later the government set up a base station on the mountain, and now mobile phone calls are much clearer.

The firefighters set up a long ladder and slowly helped the elderly person trapped by the second-floor window down; the onlookers all breathed a sigh of relief.