The design and detailing of box girders shall be such as to give full advantage of its higher load carrying capacity. Box girder shall be designed in accordance with specialist literature. The diaphragms and horizontal stiffeners should conform to 8.7.12 and 8.7.13.
8.8.1
All diaphragms shall be connected such as to transfer the resultant shears to the web and flanges.
8.8.2
Where the concentrated or moving load does not act directly on top of the web, the local effect shall be considered in the design of flanges and the diaphragms.