7 | Purlin connection at wind girder, scale i:20.The substantially stronger connection here is achieved by using an M16 threaded bar which is incorporated in the centre of the purlin and tightened via a 70 mm dia. hole in the side. These erection holes are left open in order to avoid forming a void in which condensation could collect.

8 I Wind girder connection, scale 1:20. The holes in the io mm steel flat are for Mi6 bolts which hold together the edge beam of the girder at the crown.

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