Explain what needles are and how underpinning is done with the use of needles.

Question

Quizplus · Accepted Answer

The Answer is Needles are heavy wooden timbers or steel beams that are run horizontally through the wall of a building and supported on each end. The spacing between needles in a wall is determined by an engineer. The building is supported by needles run through the foundation, then the area under the foundation is excavated and a new footing and foundation are built.

Explain What Needles Are and How Underpinning Is Done with the Use