This 24 x 24 king post timber frame could also be referred to as a post & plate with common rafters design or post and beam. Instead of the traditional king post struts connection to rafters, this frame utilizes knee braces from the king posts to the ridge. Two foot roof overhangs offer additional protection from the elements on this structure. The ridgeline soars to more than 16' with a standard 6 / 12 roof pitch, but can be altered if you prefer a different profile. Whether you leave this timber frame open or enclose it, you'll have no problem finding multiple uses for it.
This plan is also available in 18 x 24, and as a 14 x 12 timber frame with 4 posts.
24 x 24 King Post
You can see other types of roof truss designs here.