It is known that in RC construction, simplicity and repetitiveness are the keys to economy. For beam and girder framing schemes with one way slabs, the next points should be taken into account:
1. For one-way load transfer systems, placement of girder should be in the short direction between columns lines and the beams in the long direction as shown in the figure below.
1. For one-way load transfer systems, placement of girder should be in the short direction between columns lines and the beams in the long direction as shown in the figure below.
2. Beam and one-way slabs’ thickness should be counts on the minimum depths which are stated by the codes. For smoother formwork procedure the primary widths of beam and girders must be selected equally with respect to the width of the column. On the other hand, selection for one width and one depth for all beams can ease the work.
3. Always try setting the columns as best as possible in a regular orthogonal grid. Remember that square shape is the best for this purpose.
4. To be cost effective on the topic of the formwork cost, make an effort to apply the similar depth for the beams and girders in all floors and change the beam width and/or reinforcement where required as a replacement for the depth.
5. In case of the necessity of higher capacity, attempt to mend column sizes for multiple floors of the building and alter the concrete strength. If it is essential to modify the column dimension, alter only one side at once to be cost effective.
6. The maximum story heights to ignore narrowness in the column design are:
7. It is advisable to take some time to envisage the construction arrangement more efficiently for the sake of the structure elements and the process of the reinforcement placement.
8. Offer adequate spacing between adjoining steel bars to ensure that concrete will flow without any obstacle between the bars and to put off forming voids.
9. Portray to a levelheaded scale the reinforcement details of slabs, beams and columns to provide complete data to construction sites.
10. It is not recommended to use the maximum vertical reinforcement ratio in columns. As a substitute, use between 1% and 2% for economy and to steer clear of congestion of steel. One more alternative to using more than 2% reinforcement is to enhance concrete strength and/or the size of the column.
