two people working on a black metal structure

two people working on a black metal structure. The structure is built on a platform, which is surrounded by a white tarp. A yellow caution sign is visible on the tarp. The people are wearing work clothes. One person is in a red shirt and appears to be working with a level. The other person is in a black shirt and is working with tools. The structure appears to be a frame for a building or exhibit. The background shows trees and a blue sky. An orange car is parked on the right of the frame.