仮設観覧席：足場システムと迅速な組み立て

Show a demountable temporary grandstand erected beside a sports field for a single event. Render the structure as an exposed system scaffold — galvanised steel tube and ledger frames assembled into a stepped rake, with all bracing diagonals visible and the base plates sitting on timber sole boards on the grass. Detail the seating deck as modular aluminium planks with bench seating bolted on, the treads slightly springy and the risers open so the structure shows through. Show handrails and edge protection in the same galvanised tube, a stair tower at each end with a landing, and mesh infill panels along the exposed sides. Detail the temporariness honestly — cable ties, hazard tape at the base, a stack of unused planks beside it, a small crane truck still parked nearby, and ballast blocks at the corners. Show the permanent stadium stand in the background for contrast in weight and permanence. Include a partial crowd on the temporary stand. Show bright daylight. Photorealistic, industrial, galvanised grey, three-quarter view.