Detailing and Working Drawings-Task 5(Singapore Trip)

Due to this task,we were asked to observed and sketch out 3 different joints which is welded,bolt and nuts and riveted.We need to find out this 3 types of joints during our singapore trip.Either its on the furniture,exterior or in the interior.We were asked to take the picture of the joints as the proof also.But unfortunately ,i cant found the riveted joint.I had observed and sketch out the spider web joint as the replacement of the riveted joint.
These are the sketches of the 3 joints that i had observed during the singapore trip:

                                                                   1)  Bolt and Nut

2)Welded joint

3)Spider web joint(replacement of riveted joint)