 Around the altar are 360 parisrita stones (261 around ahavaniya, 78 around dhisnya, 21 around garhapatya).ŚBM 10.3.1. describes that the altar is symbolically built with gayatri (24 syllables), usnih (breath, 28 syllables), pankti (mind, 40 syllables), tristubh (ear, 44 syllables), jagati (awakening) (48 syllables) and generative breath.The gayatri altar's height is to the knees, the tristubh's to the navel and the jagati's to a man's height.