Apparatus and methods for joining nodes, extrusions, and panels are presented herein. Nodes, extrusions, and panels can be joined together using adhesive joining techniques. The adhesive joining techniques can be applied to additively manufactured nodes or extrusions, and sandwich panels. Sandwich panels can be additively manufactured and/or commercial off the shelf (COTS) components. There can bemore than one type of a joint formed by the joining techniques. Exemplary types of joints can use a liquid adhesive in conjunction with a vacuum and/or a film foam adhesive.