def test_10_rafter_410UB53_7(self):
        ans = mod_des.bld_rafter_deflection(length=16000, force=6.72, E_mod_elasticity=2.1, I_moment_of_intertia=188)
        self.assertEqual(ans['max deflection - distrib load'] , 145.24822695035462) 
        self.assertEqual(ans['max deflection - centre load'] ,  0.014524822695035461)