Installing beams is quite straightforward and one needs the proper action plan in place before moving forward. When we do the erection of structural steelwork, we are assembling the steel components onto a frame on the site. Beams will include girts and purlins along with horizontal tubes that we can bolt together. One has to make sure that the Fall Protection System is in place before beginning the work wherever applicable.
Moving the beam into position
The Beam erection involves lifting and placing components in place such as attaching the rigging to the center of the load. For this, use the appropriate choker and once you are in position, signal to the crane operator to lift the beam. Now, adjust the crane’s line with the help of the operator such that it is above the rigging point of the lift during the raising of the beam.
We finish the bolting after the assembled frame gets aligned. The planning for the construction must take into consideration the cost, program, and quality desired by the client. Getting back to the beam, once we lift it off the ground, the crane will have the complete weight of the beam. Now, it is time to stop the lift and weight until the load settles. We may not need this in all cases but when needed, one must wait.
Make sure there is enough support
After the load settles, signal to the crane operator to move the beam into place. Use enough bolts to attach the beam to the supporting structure. You can also use welds to ensure structural integrity. Before installing the members, you have to make sure that the columns have enough lateral support. This could be in the form of outriggers, girts, and crane beams.
Once we remove the weight from the load line of the crane, one must make sure that there is enough structural stability. When you have made sure of this, release the choker from the beam. We use extra temporary bracing if needed.
Planning the beam erection
For the beam erection for the railway, the planning should begin at the beginning of the design process. One has to use a practical reaction sequence and the placement of the bracing systems must be proper for the safety and smooth erection process. The design factors that help in the erection are these:
- Achievable tolerances – When tight tolerance is the norm, we design special controls designed for the purpose.
- Standardization and repetition – There are two aspects to this factor. One is the common standards and the other is the repetition of the same type of building.
- Floor systems – The choice of the floor system is important from the point of stability of the structure. This is especially true for multi-story frames.
- Frame type – You can choose between continuous frames and braced frames.
Piece count plays the most important role when planning for the erection. You can achieve an erection rate of 100 tons per week using a single hook for piece weights of 500 kgs. The number of pieces erected will depend on the type of crane used.