Stay-form bulkheads are installed at a
right angle to the rebar mats and fill the space from the
grade or mud slab to the bottom edge of the steel cover.
This cover usually takes the form of a piece of lumber that
spans the distance from the top or bottom edge of the rebar
mat to the top surface of the pour. In the case of walls,
steel coverage may be required on both surfaces.
Stay-form can easily be notched to fit
over the bottom and top mat of rebars. Tie wire is often
used to connect the slit sections together below the mat.
For relatively small pours, sections of scrap rebar are
then placed vertically (or horizontally for wall applications),
and then wire tied to the top and bottom mats. Spacing on
the vertical supports can be determined by reviewing the
load table located in the
Stay-form detail manual.
For larger base pours, it might be necessary
to use wooden or steel strongbacks or specially designed
rebar sections as vertical supports. Generally, all other
types of stud or waler supports are removed before subsequent
pours. Stay-form is then attached to the supports using
tie wire for metal supports or roofing nails, staples, tacks
or similar fasteners for wooden supports. Fasteners are
installed through the Stay-form into the supports from the
first pour side. Sheets should be placed with ribs into
the first pour and the flat backside of the sheet in contact
with the supports.
Section: Applications >