A general aviation pilot landing at BYY non-towered airport reported barricades indicating a displaced threshold are not marked sufficiently and hard to see on approach. The reporter took evasive action to avoid them and their aircraft may have contacted one of the barricades.

Narrative

While on short final approach I did not visualized well enough the start of the usable portion of Runway 13. The metal barricades are almost unperceivable from the cockpit even from a short distance which is now the half south about 2900 ft. usable runway because the new taxi way is under construction and consequently I came down probably a bit earlier than recommended. The main wheels never touching down the ground on the white chevron painted blast off area. When I realized that the barricade was still a short distance ahead; about 30 to 40 ft. in horizontal distance and about 5 to10 ft. high; I pulled up but not high enough to miss the barricade and my right main landing wheel supposedly hit the barricade. The barricade came down after the hit; as it is supposed to do so; when it got hit by my right main landing tire but I landed ahead safely. I never heard a hitting sound nor felt a push nor at anytime did I feel the airplane try to go off the runway caused by the inflicted push from the standing up barricade. After the roll out landing I had to back taxi on Runway 13 to get off on Charlie intersection; as I normally do it; but at the moment I applied power; the engine died and I tried to restart it but I was not able to. Airport personnel towed my airplane back to the hangar where I removed the top cowling half for a visual inspection of the engine and found nothing wrong or unusual. I also visually inspected the airframe; wings; main landing gear; tire; nose gear and propeller and found no scratches; unusual engine oil leaks; dents nor marks of yellow paint from the metal barricade that may have indicated me a hit with something during the landing final approach. As I understand it the metal standing up barricade is FAA-approved.I suspect that during my pull up aggressive maneuver; the stall horn never sounded off; to avoid the barricade in front of me; the engine either got flooded or starved off of fuel probably due to the feeding tank being low on fuel. I also took several pictures of the airplane after the event which I showed to my AP/IA mechanic for his review. After inspecting the prop; the left main landing gear and tire; the engine; the airframe; the wing leading edges I found no hitting marks; nor scratches nor dents nor yellow prints on the aluminum sheet or tire possibly produced by the apparent hitting of the barricade. I pulled out my airplane from my hangar and the engine started fine without hesitation and took it to the front concrete pad to make a static run and everything; engine oil and pressure and CHTs and EGT and static RPM appeared to be normal.My root cause findings. The somewhat limited perception of the relatively small stand up metal barricade; about 3 ft. high; from the air compounded by airplane distance and height above the ground and by the effect of a not very distinguishable from the air barricade line boundary with an unusual long displaced threshold and white chevroned area all contributed to lose my situational awareness between the white chevroned area and the barricade line demarcation.My recommended actions. To Install a better identification system at the barricade line to better catch the pilot's attention on final approach such as the installation of strobe lights or flashing red lights (such as the ones installed at major airports at the end of the runways called REIL -Runway End Identification Lights- which are more visible from the air and catches the pilot's attention easier and therefore improving the pilot's situational awareness. By having a displaced threshold and chevroned white area moved back by about 2900 ft. from the beginning of the Runway 13 is unusual to any pilot and has a potential for distractions; mis-judgement and errors during the approach phase in my view as pilot.The short barricades in my thinking don't help the pilot much to increase his or her situational awareness to identify the beginning of the usable runway area start from a distance and airplane's height.Some pilots have expressed their concerns about this present runway set up for this new taxi way construction phase but I believe all has been FAA-approved. The video from the airport shows the barricade up before my arrival and down after my tire supposedly hit it. My question is could the rushing air from my airplane flying over it brought it down since I did not feel or hear nothing during the alleged strike or hitting?