Recently, the safety and load capacity of 17 bridges was assessed by consultants Pitt and Sherry.

The limits are a safety precaution and follow the advice of the group, the Upper Lachlan Shire Council's acting general manager, Andrew Croke said.

"Heavy vehicles are asked to observe the temporary load limits until otherwise advised," Mr Croke said.

"We will be working to undertake the maintenance work as a matter of priority and will inform the community once the temporary load limits have been lifted."