Patent GB-610715-A (GB)
Title: Improvements in or relating to formwork or shuttering for concrete and like structures
IPC: E04G17/04
Filed: 1945-06-11
Abstract: 610,715. Casting concrete walls in situ. HAMILTON, W. June 11, 1945, No. 14779. [Class 20(ii)] Wall shuttering comprises a number of rectangular panels arranged in horizontal and vertical rows adjacent each other with locating liners between at least the adjacent horizontal edges of the panels. The liners are of hollow rectangular form and with two plain faces spaced apart the same distance as the thickness of the panels to be flush with the faces of the panels, and the other faces of the liners or of those liners extending either vertically or horizontally have multiple tongues and grooves to engage e complementary tongues and grooves in the corresponding edges of the panels. Preferably the horizontal liners have the tongues and grooves and are the same length as the panels and arranged to overlap the vertical joints between panels when vertical liners are not used. Otherwise the horizontal liners are coterminous with the panels and vertical liners, suitably secured at their lower ends in a foundation course, overlap the horizontal joints. As described, the horizontal edges of the panels are hollow, formed from two members 14, 15 dovetailed together the former rebated at 18 to receive a resin bonded plywood sheet 19 and the latter formed with tongues and grooves. The horizontal liners are likewise formed in two parts 32, 33 dovetailed together both of which are tongued and grooved on the outside and at least one on the inside. The liners and panels are secured together by U clips 41 passing through suitable holes therein and locked if required by pins passing through holes 62 in the parts. Other U clips 43 may serve both to hold the panels and liners together and to locate tie bars 42 which hold two sets of panels in parallel relationship and which are inserted through holes in the liners and have notches at their ends to engage the tongues and grooves on inside faces of the liners (Fig. 4). The tie bars instead of passing through holes in the horizontal liners may pass through holes into the hollow vertical edges of the panels and be similarly secured therein with U clips. The vertical edges of the panels have plain faces and are formed from members 12, 13 Fig. 10, having rebates for the sheets 19 and flanges 23 with various holes to receive U clips 49 which lock the panels to vertical liners 31. These liners, which are hollow and have plain faces, are formed from two members 44, 45 dovetailed together, projections 50 being provided to engage the U clips. Additional U clips 51, passing through appropriate holes lock the panels and vertical liners in a direction transverse to the plane of the panels. The clips 49 may be locked by pins passing through holes 62 as before. For casting walls meeting at an angle panels in two parts hinged together are provided (Fig. 12), the vertical edges being formed from members 53 similar to the members 12, 13, and strengthened by angles 60. The members 53 may be secured to the edge 12 or 13 of an adjacent panel by U clips. The plywood sheets 19 of the panels are reinforced by intermediate I section members parallel to the vertical edges. The Provisional Specification describes for use in casting walls at an angle instead of hinged panels, vertical liners having faces at the appropriate angle to engage the vertical edges of the standard panels. Plugs for closing any holes in the working faces of the liners which are not used for tie bars or clips are also described.