[AlisherH]

In this sec­tion, Ching gives us much in­for­ma­tion about the struc­tural units, struc­tural spans, and struc­tural pat­terns, and so on. There is a lot’s of con­nec­tions be­tween the columns and beams. Slabs or in other words plate struc­ture. It says that these slabs are like par­al­lel, they never meet. It nat­u­rally de­fines an axial. Mostly the walls are per­pen­dic­u­lar to the pri­mary axis. The spans in­di­cate the spac­ing be­tween the two columns. There are dif­fer­ent span­ning sys­tems. One way and two ways. There are Tim­ber, Steel, and Re­in­forced Con­crete. All three of these have a dif­fer­ent con­nec­tion with each other. Their joints are dif­fer­ent from the pre­cast tees and the planks are in dif­fer­ent ranges.