When setting up temporary shoring for a 4.0 m long header over a new opening, the shoring posts should be placed at a maximum spacing. According to CSA S269.1-16 'Concrete Formwork', what is the common practice for maximum shoring post spacing to adequately support temporary loads?

Question: When setting up temporary shoring for a 4.0 m long header over a new opening, the shoring posts should be placed at a maximum spacing. According to CSA S269.1-16 'Concrete Formwork', what is the common practice for maximum shoring post spacing to adequately support temporary loads?

Answer options:

• 0.6 m (2 ft) ✅ 0.9 m (3 ft)
• 1.2 m (4 ft)
• 1.8 m (6 ft)

Correct answer: 0.9 m (3 ft)

Explanation: While CSA S269.1-16 primarily deals with formwork, general construction practice for temporary shoring and falsework often uses a maximum spacing of 0.9 m (3 ft) for standard dimensional lumber walers and joists to ensure adequate load distribution and prevent excessive deflection.