Creating various 3D Models like Furniture, Footing, Girder, Column drop with panel and Gable Wall in AutoCad

1)

Ans:By using Extrude and Substract command I created this object

2)

Ans:By using box and Pyramid command I created this object

3)

Ans:By using sweep command I created this object

4)

Ans:By using Pyramid command I created this object

5)

Ans: By using slice command I created this object