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12.5-mm-thick plywood flange glued to webs

47-mm-thick by 120-mm-deep timber webs

47-mm-thick by 120-mm-deep timber webs

All dimensions are in mm

Web:

Width of the plywood web, bw

Clear height between the flanges, hw

Area of the web, Aw

Clear distance between adjacent webs, bf

Flanges: Top flange thickness, htf Bottom flange thickness, hbf Beam depth, h

Minimum bearing length on the edge beam, br

Effective flange width of an I-beam section of the panel (7.3.2.1 (EC5 9.1.2))

In compression, b1c.ef (Table 7.2 (EC5, Table 9.1))

Check on buckling length of compression flange - based on plate buckling length 7.3.2.2 (EC5, 9.1.2(5))

Check maximum width allowance in compression, bc.ef (Table 7.2 (EC5, Table 9.1))

In tension, b1t ef

Maximum allowable width, ba.i

Value to be used in tension, bt ef

Effective flange width of a panel in compression, bef.c

Effective flange width of a panel in tension, bef.t

Overall width of a panel, b bw — 47 mm hw — 120 mm

Aw — bw■hw bf — bcc - bw htf — 15.5 mm hbf — 12.5 mm h — hw + (htf + hbf)

Aw — 5.64 x 10-3 m2 bf — 353 mm h — 148 mm br — 22 mm b1c.ef = min(0.1 ■ Le, 20 ■ htf)

b1cef = 310 mm i.e. the value is based on plate buckling criteria bf

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