HTC Plant workers held the first of three one-day walkouts on Friday of last week.
They stopped several construction projects around Britain.
Major sites at London Bridge, Elephant & Castle, Victoria and Nine Elms were hit.
The Ucatt union members have rejected a 3 percent pay rise.
The 180 crane drivers were set to strike again on Friday of this week and next Friday.
HTC has barred striking crane drivers from returning to work over the weekend as they would have received overtime payments.
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