Each kind serves particular functions, such as load bearing and putting up scaffolding at various levels. https://api.ffm.to/sl/e/c/slowdive?cd=eyJ1YSI6eyJ1YSI6Ik1vemlsbGEvNS4wIChNYWNpbnRvc2g7IEludGVsIE1hYyBPUyBYIDEwXzE0XzMpIEFwcGxlV2ViS2l0LzUzNy4zNiAoS0hUTUwsIGxpa2UgR2Vja28pIENocm9tZS83Mi4wLjM2MjYuMTIwIFNhZmFyaS81MzcuMzYgVml2YWxkaS8yLjQuMTQ2OC40IiwiYnJvd3NlciI6eyJuYW1lIjoiVml2YWxkaSIsInZlcnNpb24iOiIyLjQuMTQ2OC40IiwibWFqb3IiOiIyIn0sImVuZ2luZSI6eyJuYW1lIjoiV2ViS2l0IiwidmVyc2lvbiI6IjUzNy4zNiJ9LCJvcyI6eyJuYW1lIjoiTWFjIE9TIiwidmVyc2lvbiI6IjEwLjE0LjMifSwiZGV2aWNlIjp7fSwiY3B1Ijp7fX0sImNsaWVudCI6eyJyaWQiOi