Standard versions of the HA load frame in the 50 to 500 kN range have the testing actuator mounted in the lower crosshead, below the test area. They are ideal for test arrangements which require temperature chambers or furnaces to be installed in the test area. The positioning of the actuator prevents heated air rising and causing heating of the actuator; it also prevents oil dripping into the heated test area.Among the tests which can be performed using HA load frames is low-cycle fatigue (LCF).