public
Maximum bending moment in simply supported beam under equally spaced in the middle uniform load.
Total distributed load
$$ W_d = 15000 \:
N $$
Distributed load distance
$$ b = 0.07 \:
m $$
Distance between load and support
$$ a = 0.0225 \:
m $$
$$ M_{B_{d_{max}}} = {\left({ {W_d \over 4} }\right) \cdot \left({ 2 \cdot a + b - {b \over 2} }\right)} \:, Nm $$