5.Dinh nghia modun,Pham vi ap dung cua modun mo rong.Neu y nghia cua kich thuoc rieng,kich thuoc co ban trong thiet ke cong trinh.

Modun:La don vi do quy uoc dieu hop kich thuoc cac bo phan cua cong trinh voi nhau..Dieu hop kich thuoc la chon kt dien hinh,han che kt thong nhat,nham dam bao kt nay trao doi lan nhau.

Modun goc la kt khoi dau cua modun,la don vi co so de tu do dua ra nhung kt lon hon hay nho hon cho thich ung tung loai cong trinh.Theo quy uoc Modun goc = 100mm (kh M)

Modun mo rong:2 loai

-Modun boi so:2m,3m,12m,15m,30m,60m

-Modun uoc so:1/2m,1/5m,1/10m

Tac dung cua modun:Tao co so,dieu kien cong xuong hoa san xuat,co gioi hoa ky thuat.Co kha nang thiet ke hang loat,co kha nang hop tac ky thuat va nganh trong quoc te

Kich thuoc co ban:La kich thuoc tuong ung voi nha: Buoc,Nhip-Khau do,Chieu cao tang nha

Kich thuoc rieng:La kich thuoc ap dung bo phan kien truc hay ket cau:Cua,cua so,cua di,dam,cot:Kich thuoc danh nghia,kich thuoc cau tao,kt that.