What is a snap tie designed to do after the forms are stripped?
- Pull out of the wall in one whole piece
- Stay sticking out of the wall to hold insulation
- Break off a short distance inside the wall face
- Be cut off flush with the wall surface
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C. Break off a short distance inside the wall face
Snap ties have a weakened point so the ends break back inside the concrete surface, leaving a small hole to patch. Ties that pull out whole are tapered or she-bolt ties.
Reference: ACI 347R, form ties
In a job-built wall form, what are the horizontal members that back up the studs and take the load to the ties called?
- Shores
- Sills
- Spreaders
- Walers
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D. Walers
Walers (wales) run horizontally across the studs, keep the form aligned and carry the pressure to the ties. Shores are vertical supports under slab and beam forms.
Reference: ACI 347R, wall form components
A groove is formed along the top of a footing before the wall is placed on it. What is it for?
- To drain the bleed water off the footing
- To hold the vertical dowels in position
- To mark the centreline for the form crew
- To key the wall to the footing against sliding
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D. To key the wall to the footing against sliding
A keyway lets the wall concrete lock into the footing so the joint resists lateral shear from soil or other side loads.
Reference: Formwork details: keyed construction joints