| 摘要 |
The present invention relates to concrete forming structures and in particular to concrete wall forming structures and further to strongback members used to support, at a rear edge of a wall form, the concrete wall forming structure. The strongback provides horizontal support to exterior upright structural members and the strongbacks include cooperating tie plates associates with tie bars which typically pass through the concrete material. Preferably, the strongback is an extruded member of a channel-like cross section defined by a base with opposed flanges extending from the opposite ends of the base and to one side thereof. One of the flanges includes a slot arrangement which cooperates to engage to a tie plate which can be initially supported from the strongback. The tie plate will then pass through a tie bar and an appropriate mechanical arrangement will allow tensioning of the tie bar. In one embodiment, the opposite flange from the one flange which cooperates with the tie plate is adapted to have a drop in wedge shape for cooperating with an upwardly opening bracket attached to an upright member. In this way, the strong back is easily supported from the wall form structure and conveniently supports, in an operative position, the tie plate in preparation for securing of the tie plate and also engages one end of the tie plate when a tensioning load is applied to the strongback. A modified tie plate for high load applications is also disclosed which cooperates and engages the slot provided in the flange of the strongback and overlies this flange and overlies the base member and is adapted to contact an upright member adjacent the point of contact of the strongback with an upright member. Thus, the tie plate is adapted to directly transmit some forces exerted thereon to an upright support member as well as through the strong back.
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