5 Brackets

5.1 Tripping brackets

5.1.1 Unsupported flange length

The unsupported length of the flange of the primary supporting member, in m, i.e. the distance between tripping brackets, is not to be greater than:

, but need not be less than S_b-min.

where:

b_f : Flange breadth of primary supporting members, in mm.

A_f-n50 : Net cross sectional area of flange, in cm².

A_w-n50 : Net cross sectional area of the web plate, in cm².

R_eH : Specified minimum yield stress of the PSM material, in N/mm².

5.1.2 Edge stiffening

Tripping brackets on primary supporting members are to be stiffened by a flange or edge stiffener if the effective length of the edge, as defined in Table 3, in mm, is greater than:

= 75t_b

where:

t_b : Bracket net web thickness, in mm.

5.2 End brackets

5.2.1 Proportions

The net web thickness of end brackets, in mm, subject to compressive stresses is not to be less than:

where:

d_b : Depth of brackets, in mm, as defined in Table 3.

C : Slenderness coefficient as defined in Table 3.

R_eH : Specified minimum yield stress of the end bracket material, in N/mm².

5.3 Edge reinforcement

5.3.1 Edge reinforcements of bracket edges

The depth of stiffener web, h_w in mm, of edge stiffeners in way of bracket edges is not to be less than:

or 50 mm, whichever is greater.

where:

R_eH : Specified minimum yield stress of the stiffener material, in N/mm².

5.3.2 Proportions of edge stiffeners

The net thickness of the web plate and flange of the edge stiffener is to satisfy the requirements specified in [3.1.1] and [3.1.2].