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<p>walls, concrete is laid down, vibrated, worked, and settled in place while the form itself slowly moves ahead. This method was initially devised and utilized in <a href="page.php?w=Interstate_Highway">Interstate Highway</a> construction initiated by the Eisenhower administration during the 1950s.</p>

<p><big>Vertical</big></p>
<p>In <b>vertical slip forming</b> the concrete form may be surrounded by a platform on which workers stand, placing steel reinforcing rods ahead of the concrete and ensuring a smooth pour. Together, the concrete form and working</p><p>
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