The correct answer is D. All the above.
English bond is a type of brick masonry in which every fifth course is laid as a header course, with the other four courses being laid as stretcher courses. This type of bond is strong and can support heavy loads. Double-Flemish bond is a type of brick masonry in which every course is laid with alternating headers and stretchers. This type of bond is also strong and can support heavy loads, but it has a more uniform face appearance than English bond. The stretcher bond is a type of brick masonry in which all of the bricks are laid as stretchers. This type of bond is not as strong as English bond or double-Flemish bond, but it is easier to lay and can be used for the construction of half brick masonry.
Here is a diagram of the three types of brick bonds:
English bond:
- Every fifth course is laid as a header course, with the other four courses being laid as stretcher courses.
- The headers are laid perpendicular to the face of the wall, and the stretchers are laid parallel to the face of the wall.
- This type of bond is strong and can support heavy loads.
Double-Flemish bond:
- Every course is laid with alternating headers and stretchers.
- The headers are laid perpendicular to the face of the wall, and the stretchers are laid parallel to the face of the wall.
- This type of bond is also strong and can support heavy loads, but it has a more uniform face appearance than English bond.
Stretcher bond:
- All of the bricks are laid as stretchers.
- The stretchers are laid parallel to the face of the wall.
- This type of bond is not as strong as English bond or double-Flemish bond, but it is easier to lay and can be used for the construction of half brick masonry.