In a grillage column footing maximum bending moment M occurs at the centre of grillage beams. Its value is (where P, L and a are axial load, length of the beam and length of the column base respectively).

• A. <i>M = P(L - a)</i>
• B. <img src="/_files/images/civil-engineering/steel-structure-design/100-14-95-1.png">
• C. <img src="/_files/images/civil-engineering/steel-structure-design/100-14-95-2.png">
• D. <img src="/_files/images/civil-engineering/steel-structure-design/100-14-95-3.png">
• E. <img src="/_files/images/civil-engineering/steel-structure-design/100-14-95-4.png">