The Taiga Scaffold's main purpose was to keep the entrance clear of the Boulders that spawned in the Snow Cave during the Roblox's "Winter Games 2017" Event, so players didn't need to buy Dynamite to access the biome. However, boulders were disabled from spawning anyway, meaning that the Taiga Scaffold only served as decoration throughout the event. This allowed for an easy entrance for new players to be able to complete the event's quest with additional ease.
On March 1st, the Taiga Scaffold was moved to under the area where it used to be. This makes the Taiga Scaffold the only structure inside of the lake under the Taiga Biome.
The scaffold seems to bear a resemblance to that of the framework of a short tunnel. The framework is made out Roblox's "plank" texture and has a color similar to Oak planks. As for the framework itself, the length of the tunnel on the sides are outlined by columns supporting beams crisscrossing each other to form a grid pattern on the roof.