Tilt wall knock-out panel

[twells12]

How is a large knock-out panel for a future opening, say 10'x10' door, typically constructed in an exterior concrete tilt wall panel. Obviously, the panel must be designed for the opening but how can the concrete for the door be easily removed and from the correct location?

 

[Zambo]

twells12, why can the panel not be cast with the hole fully formed? Is it a lifting issue?

Positioning should be OK after all it's only a matter of correct measurement.

If you realy have to cast and then knockout I think we first need to know why you don't want to cast with a 10' x 10' void.

 

[msquared48]

When the wall is designed, the steel is designed and placed at the exterior of the future opening as if it were there.

The concrete within the future opening is reinforced as if the opening is not there.

When the opeining is needed, a sawcut is usually made at the opening location, usually designated by a linear indentation, and then that portion of the panel is removed.

Mike McCann
McCann Engineering

 

[twells12]

Zambo, they want to allow for future dock doors because they don't need them at this time but may at a later date.

msqaured, sounds easy enough. Thanks for the info.

 

[spats]

The future opening is delineated by using a chamfer strip in the outside of the panel, usually a "V"-shaped wood strip. In the future, you simly sawcut on the groove made by the chamfer strips.

In response to msquared48's comment, the reinforcing within the future opening only needs to be designed to span the opening. The rest of the panel is capable of taking the entire load. However, you would more than likely just continue your typical vertical and horizontal reinforcing through the opening.