The assembled ganged formed blind side wall panel before it was lifted to a vertical position.
Blindside concrete wall forming.
A frame steel channel waler.
Manufacturers provide specialty form accessories.
Here workers are removing concrete and adding braces to stop the form from moving.
If the waler assembly and the forms are lifted separately a waler connection positive connection is not necessary.
Even on this short wall the concrete pressure was sufficient to move the form.
A number of specialty accessories are available to make the job easier and prevent bulging walls.
New concrete wall sometimes must be placed against existing concrete walls earth banks or shoring.
Voltex waterproofing was applied to the stay form.
This is a view of the backwall of the wall panel prior to the concrete pour.
These one sided wall forming components are designed to fit the 5 or 8 walers used with most forming systems.
When a contractor has to form a concrete wall within a few inches of an existing structure stay form is an excellent product.
However some of the systems require the use of a sill 1 to position and connect walers to formwork as an assembly.
Blind side and one sided forming by bruce a.
If you do not have the luxury or room to strip formwork stay form is the right product for the job.
When forming against a preexisting foundation wall if space allows there is a possibility that two sided forms can be used.
By utilizing stay form with rebar studs hook ties and a modular form system a one sided form or blindside wall can be constructed.
Such situations require the use of one sided forms and special attention to bracing or tying.
Tie almost any handset form system to almost any existing wall or structure.
Note the slits placed in the stay form to allow the installation of the hook tie.
The blind side or the back side between the old and new wall can be formed with instruments similar to those used for one sided forming.
Fiberglass form ties effortless installation no rust heavy duty.
According to kidder parker architects and builders handbook the first blindside membranes were multiple layers of burlap or felt swabbed with hot pitch or asphalt applied over the drainage tile and covered with bricks.
Even with blind side wall applications the vibrator operator can look down the backside of the stay form and see when the concrete paste blossoms through the form to cover the face of the form.
Steel dog offers the most comprehensive line of one sided and blind side forming hardware.
At this point one can be reasonably assured that the concrete has been properly consolidated.
The symons stay form hook ties were spaced 24 on center horizontally and 12 on center vertically for the 16 high 12 14 thick walls.
Without ties one sided wall forming can lead to bulges and blow outs.
