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Stiffener length: The length of the stiffeners lst, should fall within the range h — 6 tw < 1st < h — 6tw

where h is the clear distance between the flanges less the widths of the flange-to-web welds and tw is the web thickness.

If intermittent welds are used to connect the stiffeners to the girder web, the clear distance between welds shall not exceed 16f„ by not more than 10 in. (25.4 cm). If bolts are used, their spacing shall not exceed 12 in. (30.5 cm).

Stiffener spacing: The spacing of the stiffeners, a, shall be determined from the shear criterion fvVn > Vu. This spacing shall not exceed the smaller of 3h and [260/(h/tw) ]2h.

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