No. As per the Collective Agreements, all calls are based on a 40 hour work week. Any other shift duration listed can be changed at the contractor’s discretion without notice either according to a PLA or standard agreement. Calls may specify expected shifts but scheduling, material, weather delays, etc. may cause you not to get full expected shifts or hours worked within pay period.
* However, the two day rule still applies during the 40 hour period.