RAM Structural System Help

Hong Kong Building Regulation

For beams, Live Loads specified as Reducible are reduced by "5% for each complete 45 m2 … supported, but not more than 20% in all." No interpolation is performed for intermediate areas.

For columns, Live Loads specified as Reducible are reduced by the greater of Table 2 and "5% for each complete 45 m2 … supported, but not more than 20% in all." In the determination of Number of Floors used in Table 2, the user may specify that only floors carrying Reducible Live Load be included in that number by invoking the Criteria > Live Load Reduction command in the RAM Manager as explained previously. Note that the Regulation allows the user to also include the roof level in the determination of the number of stories supported.

No reduction is made on loads specified as Storage, Unreducible, or Roof.

It is important to note that the output lists the reduction as a percent by which the load can be reduced, rather than as a load multiplier.