a curtain wall system includes a plurality of laminated glass sections or insulated - laminated glass sections , held within a plurality of horizontal extrusions and vertical extrusions . each laminated glass section includes glass reinforcing bars having a flat bar shape . for insulated - laminated glass , the reinforcing bars have a cross - sectional shape of a ‘ z ’ such that a top cap of the glass reinforcing bars extends over the glass section and a bottom cap of the glass reinforcing bars extends over an opposing side . the laminate glass has a layer of glass , a layer of thermoplastic polymer , another layer of glass and a safety shield . the insulated - laminated glass has an outer layer of glass , a gap , a first inner layer of glass , a layer of thermoplastic polymer , a second inner layer of glass and a safety shield . such curtain wall systems resist wind loads and wind borne debris from ultimate hurricanes and tornadoes .