Best Practices for Conventional Wood System
1. When shores are rested on soft soil, a large enough plank bed should be provided underneath the shores to distribute loads over enough area to prevent any settlement when the wet concrete is placed on the forms. It is also important to place shores in the middle of the plank bed to prevent overturning of shores.
2. When the forms are erected on frozen ground, the area underneath the floor should be enclosed and heated for enough time before the placing of concrete to ensure the
removal of frost and to provide a stable foundation for the forms.
3. Beams, girders, and sometimes long slab forms should be given a slight camber to reduce any visible deflection after the placing of concrete.
4. It is important to leave one side of the column form open to clean out shavings or rubbish. The open side is immediately closed before concrete is placed. In deep, narrow forms, holes should be provided at the bottom for cleaning and inspection.
5. On less important work, it is normal practice to wet the forms immediately before placing concrete. On large jobs where forms are to be reused several times, form surfaces should be oiled or coated with form coating. Oiling or coating should be done before the reinforcement is placed to prevent greasing the steel, which reduces or eliminates the bonding between the steel and concrete. Coating should not be so thick as to stain the concrete surface.