The five 40-metre beams will form a new A90 northbound carriageway at Stonehaven.
Work to lift the structures into place will begin from 8pm on Friday, 27 October until 6am on Monday, 30 October.
Diversions for motorists will be in place
A Transport Scotland spokesperson said: "This is a significant milestone for Stonehaven. These beams are a key part of the new junction, forming a new bridge that will provide additional width for the B979 below and allow the junction to operate effectively.
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"The contractor has been working closely with Police Scotland and the local authorities to ensure anyone who needs to use this section of the B979 Netherley Road over this weekend and during the following overnight closures has an alternative available to them, while maintaining the safety of road users and road workers.
"We ask that road users who would normally use this route to plan their journeys in advance, and consider giving themselves additional travelling time, so that they can reach their destination safely and on time."
(LM/MH)
