The spacing of transverse reinforcement of column is decided by the following consideration. A. The least lateral dimension of the column B. Sixteen times the diameter of the smallest longitudinal reinforcing rods in the column C. Forty-eight times the diameter of transverse reinforcement D. All the above

The correct answer is D. All the above.

The spacing of transverse reinforcement of column is decided by the following consideration:

• The least lateral dimension of the column. This is to ensure that the transverse reinforcement is able to provide confinement to the concrete and prevent it from crushing.
• Sixteen times the diameter of the smallest longitudinal reinforcing rods in the column. This is to ensure that the transverse reinforcement is able to develop the required bond with the longitudinal reinforcement.
• Forty-eight times the diameter of transverse reinforcement. This is to ensure that the transverse reinforcement is able to resist the shear forces in the column.

In addition to the above, the spacing of transverse reinforcement should also be considered in relation to the following:

• The type of concrete used. The spacing of transverse reinforcement should be increased for concrete with a higher compressive strength.
• The size and shape of the column. The spacing of transverse reinforcement should be decreased for columns with a larger cross-sectional area or a smaller diameter.
• The loading conditions on the column. The spacing of transverse reinforcement should be increased for columns that are subjected to higher loads.

The spacing of transverse reinforcement is an important factor in the design of columns. It is important to ensure that the spacing is adequate to provide the required confinement and shear resistance.