Slides for Lecture Section E

E2-4 Structural forms. Continuous systems: 

(a) standard, 

(b) with knee-bracing,

(c) framework, 

(d) truss, 

(e) cable-stayed; braced systems: 

(f) knee bracing,

(g) split-column, 

(h) propped beam, 

(i) strut frame, 

(k) knee braced strut frame.

E3-1 Section shapes used as purlins. 

(a) Round solid timber or natural timber poles, 

(b) solid timber sections, sometimes used in groups fixed together to act as a single unit, 

(c) glued laminated sections, 

(d) Laminated Veneer Lumber, 

(e) I-beams, 

(f) box beams, 

(g) trussed rafters with punched metal plate connectors, sometimes fixed together and used in groups to form a multiple truss, 

(h) truss

E3—2 Typical purlin forms.

E4-1 Examples of plane structures made from straight members. 

(a) Truss made of two beams and with a tension tie of steel (or glulam). 

(b) Large truss with top and bottom chord of glulam. The lattice can be made of glulam, solid timber or steel (tension members). 

(c) Trussed beam with top chord

and posts in glulam. The tension tie can be made of steel or glulam. 

(d) Frame with glulam columns and (s

E4-7a/b Joint type 2, column to foundation. 

(a) (b) Simply supported columns with nailed, bolted or screwed steel bar or column shoe.

E4-7c/d Simply supported column with steel plates in a slot. It is important to

place an effective vapour barrier between wood and concrete. 

(d) Built-in columns with channels or glued in bolts cast into recesses in the

foundation.