Ib lub KD lossis khob qhov cub hlau Masonry thav duab yuav siv tau rau sab nrauv lossis cov ntawv sau sab hauv thiab tawm tsam Jamb, pob khawm jamb thiab taub hau). KD Masonry thav duab tuaj yeem ntsia tau ua ntej lossis tom qab phab ntsa tau ua. Yuav siv nrog sab nrauv ntoo stud phab ntsa thiab (tab sis cov phab ntsa uas twb muaj lawm).
16 lub ntsuas cua hlau - hluav taws-rated txog 3 teev
Phab Ntsa Thauj Rau Masonry thiab ntoo stud phab ntsa (tshiab & uas tam sim no
Txheem Jamb Qhov tob: {{{4-3 / 4 "rau 8-3 / 4"
