Medium Transport; Low Wing; 2 Turbojet Eng
Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Object; Inflight Event / Encounter Object
General None Reported / Taken
Airport; Human Factors
We were back taxiing to beginning of shortened runway 01.  I was approaching the beginning of the usable RWY 01 and noticed the arrows on the threshold.  I proceeded into the arrowed area at a low speed (10 knots or so) until I quickly noticed that this area also had the temporary yellow chevrons put there for the change of runway configuration.  It had been hard to see the chevrons in the type of lighting (daylight) we had until I was up on them.  I was in the process of stopping and turning when the tower told us to stop immediately.  I stopped and turned the plane around to taxi back to the beginning of the shortened RWY.  At that point; the tower advised us to go to normal take-off position as we were already cleared for takeoff.  While we were already turned around and almost back to the take-off point; the tower advised us to watch out for the small blocks that held down the mesh chevrons.  We saw them and we felt like we successfully avoided them; and did not feel anything unusual.About 10 minutes into the cruise flight approach passed on info from the tower that there had been some broken blocks found on the chevrons.Due to the weird lighting; I did not see the chevrons until I was upon them.  I do know that one does not taxi on chevron areas.  In this case they were co-incident with the arrows; and the arrows were more visible.  These were meshed temporary chevrons; and the white arrows showed up through them and; of course; in between them.  In the future; I will need to be more vigilant and verbalize better what I see; so that the two of us pilots can cross-check each other.
We were at SAW and given a takeoff clearance for runway 01 which involved a back-taxi. Getting close to the beginning of the runway I started my flow for the boxed items of the before takeoff checklist. I then heard the controller tell us to hold our position. I looked up and saw that we had crossed into a meshed chevron area that had visible arrows through the mesh. We turn around while the tower controller advised us of bricks holding the mesh down. Carefully the aircraft was repositioned out of the chevrons to the runway thinking we had avoided all of the bricks. We were then cleared for takeoff. 10 minutes after departure the controller notified us that tower told him that we crushed a few bricks in the repositioning.As the FO I should have gotten a feeling of the CA's interpretations of the markings. I expected something different than him in regards to the taxi plan and assumed he interpreted the markings correctly. I should have been more aware of the movement of the aircraft and completed my flow at a different time. I have learned from this event and will operate differently in the future.
Air carrier flight crew reported inadvertently taxiing over several temporary chevron 'bricks' at SAW.