Constructing environments logbook week 6

Constructing Environments Logbook Week 6 Summary

Truss ‘A truss is a structural frame based on the geometric rigidity of the triangle and composed of linear members subject only to axial tension or compression’ (Ching, 2014).         

         

(Ching, 2014)

   

Samuel Hill

Flat Truss Parallel top & bottom chords Not as efficient as pitch or bowed trusses Pratt Truss Vertical web members in compression Diagonal web members in tension Howe Truss Vertical web members in tension Diagonal web members in compression o Generally more efficient to use a truss type which the longer web members are loaded with tension Belgian Truss Only inclined web members Diagonals connect to a top and bottom chord Subdiagonals join a chord with a main diagonal Fink Truss Warren Truss Inclined web members forming a series of equilateral triangles Top chord is in compression Bowstring Truss Curved top chord meeting a straight bottom chord at each end Raised Chord Truss Bottom chords raised substantially above the level of the supports Scissor Truss Tension members extending from the foot of each top chord to an intermediate point on the opposite top chord (Ching, 2014).

Constructing Environments: Week 3 Logbook

Student Number: 722052

Plates and Grids ‘Plate strutures are rigid, planar, usually monolithic structures that disperse applied loads in a multi directional patterm, with the loads generally following the shortest a stiffest routes to the supports. Common example is a reinforced concrete slab’

(Ching, 2014).

Samuel Hill

Constructing Environments: Week 3 Logbook

Student Number: 722052

Glossary of terms Rafter:

Extend from a wall plate to a ridge board or ridge beam and support the sheathing and covering of a roof (Ching, 2014).

Purlin: Battens attached to and running parallel to the rafters. The roof covering is attached directly to the purlins. Provides additional tensile strength.

Cantilever:

Projecting beam or other rigid structural member supported at only one fixed end (Ching, 2014).

Portal Frame: Consist of two columns and a beam or girder that are rigidly connected at their joints. Rigid only in its plane.

Requires lateral bracing.

Top Chord: The sThe top member of a truss construction. Carried the primary load which is then distributed via web members to the bottom chord and then to the supporting columns.

Eave:

Created when top chord extends past supporting stud.

Soffit: Lining covering the eave Alloy:

A combination of carbon steel and other various elements added in a sufficient amount to obtain particular physical or chemical properties (Ching, 2014).

Reference List Ching, F, D, K. (2014). Building Construction Illustrated. Hoboken, New Jersey: John Wiley & Sons.

Samuel Hill

Constructing Environments: Week 3 Logbook

Student Number: 722052