A chamfer for securing precast concrete wall panel forms that are used in tilt-up construction. The chamfer includes an elongate base portion and at leastonechamfer portion coextensive with the lengthwise direction of the elongate baseportion. The base portion defines a substantially horizontal base plane. Thechamferportion includes a first leg disposed upstanding relative to the base portion,and asecond leg portion angularly disposed relative the first leg. The second legfurtherincludes at least one flexible edge that projects beyond at least the baseplane or theplane defined by the lengthwise direction extension of the first leg.Depending onwhich part of the second leg the edge is cantilevered from, it forms a sealedrelationship between the chamfer and a casting surface, the chamfer and aplank usedas part of the wall form, or both. The application of weight, usually due totheaddition of a plank, causes the base portion of the chamfer to flex, which inturncauses the flexible edges disposed on the chamfer outside the elastic curvedefined bythe flexed base portion to splay, and edges disposed on the chamfer inside theelasticcurve to pinch, thereby effecting a seal to minimize or eliminate leakageassociatedwith the poured concrete.
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