What is Type Z bedding?

Type S is the preferred granular bed and surround detail. Type Z is recommended where depths of cover are less than 1.2m. Joint filler board shall be placed in contact with the end of the socket at a pipe joint and shall extend through the full thickness of the concrete in contact with the pipe.

What should be used as a bedding material for pipes?

When the pipes are to be laid in rock, compacted sand or gravel, or in very soft or wet ground requiring mechanical means of trimming, the bedding should be a minimum of 100mm.

What is pipe bedding factor?

The pipe bedding factor of 1.5 depends on the granular material being laid flat and the weight of the pipe causing it to settle slightly into the bedding material after placement. This allows the bedding to provide support to the pipe of around 45° of the pipe circumference.

What is B bedding material?

Class B bedding is defined as that method of bedding in which the pipe is set on granular material meeting the requirements of Section 9. 3.2 in these STANDARDS AND SPECIFICATIONS. Granular material shall be placed around the sides of the pipe and to a minimum of twelve inches above the top of pipe.

What are the requirements for water pipe bedding?

5.04.01 Water Pipe Bedding Sand: Bedding Sand shall be free of ice, clay, excessive organic matter and other deleterious material, and shall conform to the requirements for Class A Backfill as defined in the Standard Specifications for Public Works Construction, Aggregates for Bedding and Backfill.

What is the Class C load factor for pipe bedding?

Class C – Load Factor 1.5. With ‘C’ bedding, ordinary care is used to shape the bottom of the trench directly under the pipe. The bottom is shaped to bed the pipe for a height equal to 1/2 of the pipe diameter.

What kind of bedding do you use for concrete pipe?

Type S is the preferred granular bed and surround detail. Type Z is recommended where depths of cover are less than 1.2m. Joint filler board shall be placed in contact with the end of the socket at a pipe joint and shall extend through the full thickness of the concrete in contact with the pipe.

How tall should a trench be for pipe bedding?

This bedding method is NOT RECOMMENDED as a bedding alternative. Class C – Load Factor 1.5 With ‘C’ bedding, ordinary care is used to shape the bottom of the trench directly under the pipe. The bottom is shaped to bed the pipe for a height equal to 1/2 of the pipe diameter.