The best replacement for metal frame is wood frame.

The best alternatives to metal frame are rated as following:
★★★★★  wood frame
★★★  ultra frame pool
★★★  easy set pool
★★★  inflatable pool
★★  ultra frame
★  plastic frame
★  ring pool
★  quick set pool
★  post frame
★  ultra frame pools
  easy set

Your alternative for metal frame is not listed? Suggest!
Speaking about metal frame, one probably shouldn't forget about wood door.

Other search terms related to metal frame and their ratings are:
★★★★★ wood door
★ wooden slats
★ floating glass desk
You have in mind a companion for metal frame and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of metal frame in all years. Click on graph for more.
metal frame
wood frame
ultra frame pool