What is Pinned Connection Joint? Explain in details step by step procedure to make a Pinned Connection Joint with example and application.

A pinned connection joint, also known as a hinged joint, is a type of connection that allows for rotational movement between two structural members. The joint is designed to transmit axial loads while allowing free rotation. Here is a step-by-step procedure to create a pinned connection joint:

Step 1: Prepare the materials Gather the materials you want to connect using the pinned connection joint. These could be beams, columns, or any other structural members. Ensure that the materials are clean, free from debris, and have smooth surfaces for optimal contact.

Step 2: Determine the joint location Decide on the location where the pinned connection joint will be established. It is typically located at the end of one member, allowing for rotation.

Step 3: Fabricate the connection plates Prepare the connection plates that will facilitate the joint. These plates are typically made of steel and have holes drilled to align with the members being joined.

Step 4: Mark the hole locations Using a measuring tool, mark the hole locations on the connection plates. Ensure that the hole positions align with the members’ end surfaces and will allow free rotation.

Step 5: Drill the holes Using a drill press or other suitable drilling equipment, drill holes through the marked locations on the connection plates. The hole diameter should match the diameter of the pin or bolt that will be used to secure the joint.

Step 6: Position the connection plates Position the connection plates on the end surfaces of the members to be joined. Ensure that the plates align with each other and the holes are properly aligned with the members.

Step 7: Insert the pin or bolt Insert the pin or bolt through the holes in the connection plates and the members. The pin should fit snugly, allowing for free rotation of the joint.

Step 8: Secure the pin or bolt On each end of the pin or bolt, place a washer and a nut. Tighten the nuts to secure the connection plates and the members together. Ensure that the joint can still rotate freely.

Step 9: Inspect the joint Inspect the joint to ensure that the pin or bolt is securely fastened, the connection plates are properly aligned, and there are no gaps or misalignments. Verify that the joint allows for free rotation without binding.

Example and application: An example of a pinned connection joint can be seen in truss structures, where beams or truss members are connected to columns or supports. The pinned connection allows the truss members to rotate freely, enabling the structure to withstand changes in load and temperature.

Pinned connections are also used in the construction of roof trusses, crane structures, and other applications where rotational flexibility is required. They allow the structure to adapt to external forces, distribute loads, and accommodate thermal expansion and contraction.

It’s important to note that the design and specific details of a pinned connection joint may vary based on the application and the loads involved. Always refer to appropriate design guidelines and consult with a qualified engineer for the specific requirements of your project.