NOVELTY - A lattice composite matrix support structure has strut(s) including fiber/polymer components having filaments and/or fibers, and polymeric materials. The components are layered in interweaved configuration which intersect at nodes to form struts. The fiber/polymer components and filaments or fibers of fiber/polymer components are stabilized by embedding within polymeric material(s) by curing polymeric materials. The filaments and/or fibers are preloaded by application of outward expansion pressure to lattice structure before and/or during curing of polymeric materials.    USE - Lattice composite matrix support structure is used for two-dimensional support structure for microwave, ultra-high frequency device, very-high frequency device, satellite, cellular, Wifi, broadband, wind or solar power production device, energy/power transmission, surveillance, lighting (all claimed), containment fencing, camera and antenna support.    ADVANTAGE - The lattice composite matrix support structure is lightweight and has excellent installability, durability and stability.    DETAILED DESCRIPTION - A lattice composite matrix support structure has one or more struts including fiber/polymer components having filaments and/or fibers, and polymeric materials. The layered component in interweaved configuration that intersect at nodes to form the struts. The fiber/polymer components and filaments or fibers of the fiber/polymer components are set into a stabilized position by embedding within polymeric material(s) by curing the polymeric materials. The filaments and/or fibers are preloaded in aligned, straightened and/or tensioned state by application of outward expansion pressure to the lattice structure before and/or during curing of the polymeric materials. INDEPENDENT CLAIMS are included for the following:    (1) expandable tool for producing lattice composite matrix support structure;    (2) manufacture of lattice composite matrix support structure; and    (3) two-dimensional support structure.