When supporting a tiny house trailer, it’s essential to raise the trailer enough that the majority of the weight is relieved from the tires and axles, but not too much that the tires can spin freely.
For tiny house trailers 16-28 feet in length, we recommend 6 support jacks. As seen in Fig.1 to the below, 2 jacks are located at the rear of of the trailer, 2 in front of the wheel wells and 2 angled jacks on the a-frame
Cinder block used in conjunction with pressure-treated 2x6 lumber make for a solid support jack. Fig. 2 illustrates a combination of these 2 materials to gain the appropriate height to support the trailer.
The above illustrations are for a 16' tiny house trailer and may not represent your specific case.