Concrete Pad

1. If concrete pad is required, the guardrail post is extracted first from the footing. 
2. A square pit by the dimension of 300 mm x 300 mm x 200 mm (as shown in the drawing) is dug.
3. The guardrail post then place into the pit, suspended to the required height.  String can be used to ensure uniform level is achieved on all the selected raised guardrails.
4. Concrete grade 20 is then poured into the pit, properly compacted and let to cure for 3 days.

Guardrail Works

 Guardrail Jacking

1. Guardrail to be raised is demarcated and confirmed at site with the Engineer representative.
2. Depending on type of footing surface, the height of post shall be 710 mm for concrete surface and 800 mm for non-concrete surface.  The following drawing shown the final height of guardrail as intended after the jacking.

  
Guardrail Jacking (using heavy duty hydraulic jack or chain block)

1. The equipment is positioned adjacent to the identified post.
2. Manually, the post is raised to the required height as mentioned in (ii) above.
3. Upon achieving the required height, the footing of guardrail post is properly compacted as to ensure that the post shall not ‘slip down’.