public static Dictionary<string, object> ShearStrengthOfHeadedAnchor(double d_sa, double R_g, double R_p, double fc_prime, double w_c, double F_u = 65, string Code="AISC360-10"
            )
        {
            //Default values
            double Q_n = 0;
            double phiQ_n = 0;

            //Calculation logic:
            HeadedAnchor a = new HeadedAnchor();
            Q_n =a.GetNominalShearStrength(d_sa,R_g,R_p,fc_prime,F_u,w_c);
            phiQ_n = a.GetShearStrength(d_sa, R_g, R_p, fc_prime, F_u,w_c);

            return new Dictionary<string, object>
            {
                { "Q_n", Q_n },
                { "phiQ_n", phiQ_n }
 
            };
        }