DSK PIONER-AM (with PVC steps)
http://gera-sport.ru/katalog/detskie-sportivnye-kompleksy/dsk-dlja-doma/pioner-a 

Children’s sports complex Pioneer m
https://www.techport.ru/katalog/products/sportivnye-tovary/detskie-sportivnye-kompleksy/domashnie/pioner-m-sine-zheltyj?utm_source=admitad&utm_medium=cpa&utm_campaign=b49adut_adm_adm_adm_campaign_adv_adm 

In the archive:
.max 2016
.max 2013
.obj
.mtl
.jpg (render)

Another model:
https://3dsky.org/3dmodels/show/childrens_sports_complex_set_1 

All models:
https://3dsky.org/users/JOeMax/models