Reinforced-concrete floor slab thickness indicator/reinforcement rod spacer combination

A reinforcement-concrete floor slab thickness indicator/reinforcement rod space combination, comprising:

• a base,
• a reinforcement rod spacer fixedly mounted on the base, comprising:
• a cylindrical seat portion fixedly mounted on the base and having a diameter dimensioned substantially the same as a width of the base, a medial portion threadedly engaging with the seat portion and defining a concavity, a reinforcement rod supporting portion slideably mounted on the medial portion and a spring mounted between the medial portion and the supporting portion to continuously exert a cushioning force on the supporting portion;
• and
• a floor slab thickness indicator sub-assembly, comprising:
• mounting means fixedly attached to a portion of the spacer;
• clamping means slideably mounted on the mounting means and movable between a locking and an unlocking position;
• controlling means connected with the clamping means and movable between a first and a second position whereby when the controlling means is moved to the first position, the clamping means is moved to the unlocking position, and when controlling means is moved to the second position, the clamping means is moved to the locking position;
• and
• an indicator extending through the mounting means whereby when the clamping means is moved to the locking position, the clamping means fixedly engages with the indicator and locks the latter in position, and, when the clamping means is moved to the unlocking position, the fixed engagement between the indicator and the clamping means is released.