ANTI SAG SUPPORT FOR WIND UPLIFT
In roof situations where the effect of uplift on the structure must be managed the use of anti sag components may be mandatory depending on the advice given in the load tables. Outlined below are general details for the application of anti sag support. These apply where screw fixed steel sheeting is used which fully restrains the top flange of the purlin. Additional more job specific information may be obtained by contacting Duggan Profiles.

Construction details

The general arrangement for anti sag members for uplift conditions is categorised by the quantity involved and illustrated in the diagram below. The number to use is specified in the uplift section of the load tables.

1 sag rod at mid span	2 sag rods at one third points