RAM Structural System Help

China GB 50009-2001

For loads specified as Reducible, the live load on any beam supporting 25 m2 or more of Reducible live load is reduced 10% (the reduction coefficient is 0.90) per Clause 4.1.2.1(1). This would be applicable to loads in Item 1 in Table 3.1.1.

For loads specified as Storage, the live load on any beam supporting 50 m2 or more of Storage live load is reduced 20% (the reduction coefficient is 0.80) per Clause 4.1.2.1(2).

For loads specified as Reducible, the live load on any column is reduced per Table 4.1.2 as specified in Clause 4.1.2.2(1). As specified in that table, for a one-story column if the tributary area of the column is greater than 25 m2, the reduction coefficient is 0.90.

For loads specified as Storage, the live load on any column supporting 50 m2 or more of Storage live load is reduced 10% (the reduction coefficient is 0.90) per Clause 4.1.2.2(2).

The user must explicitly specify loads as Reducible or as Storage in order for the corresponding reductions to be performed.

No reduction is made on loads specified as 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.