Manasara 19.2

19.2

pūrvahastena saṃyuktaṃ harmyaṃ jātiriti smṛtam
chandaṃ tripādahastena vikalpaṃ syāttadardhakam

An edifice constructed with the primary cubit is known as jāti; / chanda is with a three-quarter cubit; vikalpa is with half of that;