Abstract: A delta-shaped roof joist structure provided with load transfer wall attaching clips at spaced intervals therealong for transferring both horizontal and perpendicular loads between the joist structure and a wall of a building. The load transferring clip structure includes a formed member of plate-like material having at one end a U-shaped portion for association and adjustment along a load transfer angle iron of an associated roof joist, and on the other end the member having an extension integral with one side of the U-shaped portion, and at substantially right angles thereto. The extension has an aperture for reception of wall affixing fastening elements therethrough.