E - Fixed Constructions – 02 – D
Patent
E - Fixed Constructions
02
D
E02D 29/12 (2006.01) E04G 11/04 (2006.01)
Patent
CA 2213281
A method and apparatus for forming a benching portion and a channel portion in a concrete manhole base. The apparatus includes a unitary form member having a benching forming portion and a channel forming portion connected to the benching forming portion. The benching forming portion has a contact surface portion for contacting a support surface of a conical form used in forming a conical inner surface of the manhole base. The support surface and the contact surface portion has an outer perimeter following the contour of an outer perimeter of the conical form member. The outer perimeter of the unitary form member is within the outer perimeter of the conical form member when the integral member is placed on the support surface, such that when uncured concrete is poured over the unitary form member, the contact surface is pressed against the support surface to seal between the contact surface and the support surface and such that removal of the unitary form member is facilitated after the concrete has cured.
Méthode et appareil pour former une partie banc et un profilé dans la base d'un regard. L'appareil comprend un élément de coffrage monolithe qui comporte une partie banc et un profilé relié à cette partie. La partie banc comporte une surface de contact qui touche à une surface d'appui d'un élément de coffrage conique utilisé pour former la surface interne conique de la base du regard. La surface d'appui et la surface de contact présentent un périmètre externe qui entoure le périmètre externe de l'élément de coffrage conique. Le périmètre externe de l'élément de coffrage monolithe se trouve à l'intérieur du périmètre externe de l'élément de coffrage conique lorsque l'élément intégral est placé sur la surface d'appui, de sorte que, lorsque le béton est coulé sur l'élément de coffrage monolithe, la surface de contact est pressée contre la surface d'appui afin de sceller ces dernières l'une contre l'autre et de sorte que le retrait de l'élément de coffrage monolithe est simplifié une fois le béton durci.
Fetherstonhaugh & Co.
Mcintosh Robert Gordon
LandOfFree
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