Request flange bolt option ‘Holes only’ so that we can achieve 10 holes yet only 6 purlin bolts per lap connection as per the Lysaght manual extract attached. Choosing the flange bolt option 'None' removes the holes as well as the bolts. Choosing the flange bolt option 'Top and bottom' gives us 4 extra purlin bolts per lap connection. Many projects we do have a few hundred of these connections, so surplus purlin bolts listed in the bolts BOM would be significant if we choose this option.