... ,conch model17Optionsceilingroof board is also ceiling board, so this house don't need to make ceiling again.18canopycolor ... hammer, spanner, screwdriver etc, need power to install the house30EfficiancyFour skilled labor one day can erect 40m2's house ... really interested in our steel structure building, please kindly give us the following information: 1. Dimension: Length, width, height, eave height, ...