A method and apparatus for retaining model structural members during construction includes a base member having a plurality of recesses therein, at least one and preferably a plurality of retainers, and advantageously at least one clip having a plurality of edges and at least one arm for holding model structural members between the arm and a corresponding edge. The retainers are releasably received in the recesses and preferably include a lobe with a surface which is eccentric relative to the peg received in the recess. By turning the retainer, a biasing force may be exerted against a model structural member. The clips help to maintain the model structural members in desired orientation while bonds therebetween are cured during assembly.