Trusses can be divided into two categories: planar trusses, with all node within a single plane (like the truss in Figure 11-36), and space trusses, in which nodes extend in all three dimensions (like the truss in Figure 11-38) Space trusses are generally sturdier than planar trusses, and thier simple construction allows for modular building. As Figure 11-38 shows, a simple space truss can actually be a combination of two or more planar trusses