In case of multi-storeyed buildings, the forms to be removed first are A. Sides of beams and girders B. Column forms C. Bottom of beams and girders D. All the above at the same time

The correct answer is: A. Sides of beams and girders.

The sides of beams and girders are the first to be removed because they are the least critical to the structural integrity of the building. The columns and bottom of beams and girders are more critical and should not be removed until the building is structurally sound.

Here is a brief explanation of each option:

• A. Sides of beams and girders: The sides of beams and girders are the least critical to the structural integrity of the building. They can be removed first without compromising the safety of the building.
• B. Column forms: The columns are the vertical supports of the building. They are more critical than the sides of beams and girders and should not be removed until the building is structurally sound.
• C. Bottom of beams and girders: The bottom of beams and girders are the horizontal supports of the building. They are more critical than the sides of beams and girders but less critical than the columns. They should not be removed until the building is structurally sound.
• D. All the above at the same time: It is not advisable to remove all the forms at the same time. This can compromise the structural integrity of the building and lead to collapse.