* Profi adeiladu pentyrrau sylfaen trwy logio sonig croes-twll;
* Archwiliad o ddiffygion concrid gan ddull ultrasonic, megis ardal anghytundeb, cellog, twll.
* Canfod diffygion o un twll fesul un sbardun a dderbyniodd dau.
* Profi perfformiad dynam o ymchwiliad geotechnegol, creigiau, concrit ac ati.
