How many types of common shoring are recognized?

The correct answer is six types of common shoring. Shoring is a method used to provide temporary support to structures during construction or repair processes. Understanding the types of shoring is crucial for maintaining safety and stability in excavation or construction work.

The recognized types typically include:

1. Vertical Shoring: Used to support vertical walls or columns.

2. Horizontal Shoring: Designed to brace horizontal beams or elements.

3. Raking Shoring: This type provides support through angled braces, often used in sloped applications.

4. Flying Shoring: Utilized to support walls at varying heights or where space is limited.

5. Needle Shoring: Involves the use of needles (long beams) that support and transfer loads where access is restricted.

6. Contrary Shoring: A method that supports walls by applying pressure in opposite directions, often used for retaining purposes.

Each type serves a unique purpose and is selected based on specific site conditions or structural requirements, making an understanding of all six types essential for effective shoring practices in various construction scenarios.