To withstand such loads, the codes typically call for a tensile modulus of rupture strength of at least 50 lbf/in2 (0.345 newton/mm2) for the finished block.
tə wɪðstˈænd sˈʌtʃ lˈoʊdz, ðə kˈoʊdz tˈɪpɪkli kˈɔːl fɚɹə tˈɛnsəl mˈɑːdʒuːləs ʌv ɹˈʌptʃɚ stɹˈɛŋθ ʌv æt lˈiːst fˈɪfti ˌɛlbˌiːˈɛf slˈæʃ ɪn tˈuː zˈiəɹoʊ.θɹˈiːhˈʌndɹɪd fˈoːɹɾi fˈaɪv nˈuːtən slˈæʃ ˌɛmˈɛm tˈuː fɚðə fˈɪnɪʃt blˈɑːk.