A panel formed by resin infusion from two fiber reinforced resin layers and a separating core is connected to a member such as a metal rail or another panel by an adhesive joint. The panel edge is shaped to define a male portion with a web and two side portions and the rail is channel shaped to match. A layer of adhesive of a thickness not less than 0.03″ or more than 0.10″ covers the base and sides. The tapered shape allows the adhesive located between the web of the panel and the web of the member, between the flange of the panel and the surface of the member and between the flange of the member and the second surface of the panel to be simultaneously compressed without the necessity for any shearing in the adhesive layer.