ΣV=0,VA+VB=150‌kN ΣH=0,HA=HB=H At support B , ΣMB=0 VA×20−150×16=0 VA=120‌kN VB=150−120=30‌kN At central hinge, ΣMC=0 VA×10−H×4−150×6=0 H×4=120×10−150×6 H=75‌kN So, the vertical reaction at A and the horizontal thrust are 120 kN and 75kN respectively.