At Shipai station in Guangzhou, they need a shelter for train maintenance. We were happy to accept this order.
This is a totally permanent structure tent and a hard work. We used A Frame structure roof above the concrete poles.
Even the alu material could as stable as it can. But thinking about the budget and stability, we rather to trust concrete.
About the roof, we have to concerned another factor that is convenience. The fabric cover on top is easier to move in and out.