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		Formwork Making - Course: Timberwork techniques. Instruction examples for practical vocational training (Institut für Berufliche Entwicklung, 23 p.)
			(introduction...)
			Preliminary Remarks
			Instruction Example 1.1. Prefabrication of Formwork Panels
			Instruction Example 1.2. Ceiling Formwork Making
			Instruction Example 1.3. Strip Foundation Formwork Making
			Instruction Example 1.4. Beam Formwork Making
			Instruction Example 1.5. Column Formwork Making

Instruction Example 1.3. Strip Foundation Formwork Making

This example serves to practise making of a strip foundation formwork to given dimensions of a drawing (without lateral border).

Material

Formwork boards
square timbers
nails of different sizes
tie wire
steel nails

Figure

Hand tools and machines

Circular saw, hand saw, hammer, wrecking bar with claw, nail pincers, bit, bit brace

Measuring and testing means

Folding rule, try square, water level, measuring rods

Auxiliary accessories

Paper, pencil, line

Necessary previous knowledge

Handling of length measuring tools, scribing, manual sawing and working with the circular saw

Explanations to the working drawing

1 stull, 2 formwork sheeting, 3 post, 4 waler, 5 width of foundation, 6 steel rod for tieing of the tie wire, 7 tie wire

Sequence of operations

Comments

1. Study the formwork project.

Under the strip foundation to be erected there must be a horizontal layer of concrete (approx. 100 mm)!

2. Stretch the alignment lines.

The upper edges of the foundation determine the points of alignment of the lines. Use line supports or other measuring point aids!

3. Nail a formwork bottom board onto the foundation.

Nail on the formwork bottom board with steel nails exactly in alignment.

4. Erect the vertical post timbers
- Distances between the post timbers: 600 mm
- Length of the post timbers depending on the foundation height.

After erection of the post timbers fix them with nail pins. On top the post timbers are to be stabilize by stulls to be nailed on!

5. Fixing of the sheeting boards to the post timbers by nailing.

Start nailing from the bottom!

6. Fixing of horizontal walers (both sides) to the post timbers by nail pins.

The distance of the walers from the formwork bottom boards depends on the height of the foundation and is approximately 1000 mm.

7. Place steel reinforcement, if provided for.

8. Nail stulls on top of the side walls near the places of tieing (by tie wire).

The stulls must only slightly project over the formwork sheeting!

9. Tie the formwork from waler to waler at distances of 600 mm by means of tie wire.

Wire to be guided through previously bored holes in the formwork sheeting (see working drawing).

10. Check the whole formwork again for alignment and accuracy to size and stabilize it laterally by diagonal bracing to the subsoil.

Make corrections in case of dimensional deviations!

Strip Foundation Formwork Making

Sequence of operations	Comments
1. Study the formwork project.	Under the strip foundation to be erected there must be a horizontal layer of concrete (approx. 100 mm)!
2. Stretch the alignment lines.	The upper edges of the foundation determine the points of alignment of the lines. Use line supports or other measuring point aids!
3. Nail a formwork bottom board onto the foundation.	Nail on the formwork bottom board with steel nails exactly in alignment.
4. Erect the vertical post timbers - Distances between the post timbers: 600 mm - Length of the post timbers depending on the foundation height.	After erection of the post timbers fix them with nail pins. On top the post timbers are to be stabilize by stulls to be nailed on!
5. Fixing of the sheeting boards to the post timbers by nailing.	Start nailing from the bottom!
6. Fixing of horizontal walers (both sides) to the post timbers by nail pins.	The distance of the walers from the formwork bottom boards depends on the height of the foundation and is approximately 1000 mm.
7. Place steel reinforcement, if provided for.
8. Nail stulls on top of the side walls near the places of tieing (by tie wire).	The stulls must only slightly project over the formwork sheeting!
9. Tie the formwork from waler to waler at distances of 600 mm by means of tie wire.	Wire to be guided through previously bored holes in the formwork sheeting (see working drawing).
10. Check the whole formwork again for alignment and accuracy to size and stabilize it laterally by diagonal bracing to the subsoil.	Make corrections in case of dimensional deviations!