Here is an autocad dwg file where there is a 3D view of the desk for office with its chair and appropriate space planning with all detailing.
Column and stair section d
The chimney detail derived
Foundation to wall section
Display of walls
Building material plan det
Needle section detail dwg
Water tank detail drawing
Bridge details
Manufacturing factory deta
Sealing material plan deta
Construction detail dwg fi
Detail drawing of water ta