Generally, the displaced threshold is not because of the load of touching down, but because of clearance of obstacles. When landing, where you are aiming to lan

Generally, the displaced threshold is not because of the load of touching down, but because of clearance of obstacles. When landing, where you are aiming to land, and a standard glideslope, puts you over obstacles at a certain height. In some cases if you landed on the very end of he the runway, that would cause you to collide with (or have too low a margin of safety) over obstacles before the runway. The displaced threshold moves the glideslope further forward, allowing for better clearance over obstacles. Source: Advisory Circular 150/5300-13B Airport Design, 3.5.3 (https://www.faa.gov/documentLibrary/media/Advisory_Circular/150-5300-13B-Airport-Design.pdf https://www.faa.gov/documentLibrary/media/Advisory_Circular/...) When it is impractical to locate a threshold at the beginning of the runway, it may be necessary to apply a displaced threshold. A displaced threshold reduces runway length available for landings in one direction. The portion of the runway prior to the displaced threshold typically remains available for takeoffs. Depending on the circumstances surrounding the displacement, operations from the opposite runway end may or may not be affected. Refer to Appendix H for related information on declared distances. Generally, a runway threshold displacement provides: 1. A means for obtaining additional RSA prior to the threshold. 2. A means for obtaining additional ROFA prior to the threshold. 3. A means for locating the RPZ to mitigate incompatible land uses. 4. A means for obstacle clearance prior to the threshold. 5. Increased arrival capacity with certain parallel runway approach procedures. See FAA Order 7110.308, Simultaneous Dependent Approaches to Closely Spaced Parallel Runways Glossary: RSA: Runway Safety Area ROFA: Runway Object Free Area RPZ: Runway Protection Zone Note that all of the given reasons are for clearance of obstacles or various other mandatory safety areas based on clearance from taxiways or other runway traffic, not for durability of the runway.