The model consist of three separate pieces, separated by materials properly named in all file formats ['rest'-236 faces, 'seat'-192 faces, 'chair_frame'-5512 faces, all quads]. The parts, named 'seat' and 'rest' in model space, are double sided (backface cull is off) because of the grating material application. The 'chair_frame' is single piece of smoothable geometry.
The model's dimensions are in real world units [1:1, 1cm=1cm].
Shaders included are for Mental-ray in Maya format. Two shader nodes named 'frame' and 'grate' are in Maya's Hypershader. Shader named 'grate' has opacity and displace textures connected to it. In 3dsMax and in *.obj format, materials aren't included, but can be easily recreated using included textures.
Opacity and displacement maps included. Both in *.bmp format, 512x512 pixels in size. The displacement map can be also used as a bump map. Textures are seamless (tileable), so density of the grating surfaces can be easily changed.
UV-ing is done in a way that textures match on both grated parts (the 'belts' match on 'seat' and 'rest' surfaces, as seen on the thumbnails), in all file formats.