Grate-popping expanded metal. Step on the platform and it can snap, crackle, and pop. Sound-echoing hollow tube.
Hollow tubes can become echo chambers, amplifying noise.
Tin-creaking formed metal. These stands develop squeaks due to metal on metal contact. Annoying creaks and other unwanted noises associated with excess joints, bolts and rivets are also absent. You may give each page an identifying name, server, and channel on the next lines.