The OMG RetroDriller must penetrate through the purlin in a minimum of 1-in. Using a screw gun with a maximum of 1800 RPM, drive the fastener through the purlin until a slight depression is seen around the plate.
NOTE: Caution should be taken not to overdrive the fastener causing stress plate and surface to deflect more than 1/16-in. Prior to job bid, contact OMG to visit the job site and inspect the deck.