Model have only quad polygons. No poles with more than 5 edges. Create in real-world scale, centimeters unit system. Aproximate size of one ladder 138 x 70 x h 210 cm. All objects and materials have suitable names. Object are contained in a separate layer 'Stepladder'. Scene have 4 PNG textures 4096x4096.
For envoronment used 3 VrayLight and 1 Spot, HDRI map for reflection (include in archive).