Park bench on a central leg with a backrest and armrests.
Steel structure wooden seat and backrest

Made in size and photo from the manufacturer’s website:
https://www.mmcite.com/en/intervera 

Wide bench dimensions:
Width:1200mm
Height: 795 mm
Depth: 560 mm.

Narrow bench dimensions:
Width:600mm
Height: 795 mm
Depth: 560 mm.

One wide bench model and one narrow bench model are saved in the scene.

Models have a Turbosmooth modifier set to Render Iterations2 which only applies during rendering.
In the obj file the model is saved without Turbosmooth.

All objects have normal names.
All materials have convenient names.

Model weight without Turbosmooth:
7276 polygons
7312 vertices

The Pivot Point is aligned to the center of the model.

Those who work in V-Ray versions lower than 3.1 be careful in the materials in the BRDF section there is Microfaset GTR ( GGX ) if your version is older than 3.1 then the BRDF field will be empty. Choose Blinn Phong or Ward – whatever suits you best.

For Corona render it is recommended to install a version of at least 1.5 since the glossiness of materials is configured with PBR in mind.