Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
28 Cards in this Set
- Front
- Back
|
material that is used for a variety of structural forms such asbeams, columns, trusses, girders, and is also used in building systemssuch as piles, deck members, railway sleepers, and in formwork forconcrete |
timber |
|
|
intl timber structures examples (2) |
BROCK COMMONS TALLWOOD HOUSE VANCOUVER, CANADA LOU STUDIO’S LONGFU LIFE EXPERIENCE CENTER, CHINA |
|
|
timber structures in the ph |
Mactan-Cebu International Airport |
|
|
most impressive feature of the Mactan-Cebu International Airport |
dramatic roofstructure made of glue-laminatedtimber beams |
|
|
advantages of timber (6) |
readily available safe easy to work cost effective versatile and visually appealing naturally anti corrosive |
|
|
disadvantages of timber (4) |
shrinks, swells, twists, cracks, and bends over time and diff climatic conditions prone to pest, rot, mold, fungi attacks tend to silver or look old if left natural and unpainted maintenance can seem to be higher than other building materials |
|
|
choice of timber on strength basis for beam, rafters, and floor joints,: |
high bending strength and adequate stiffness |
|
|
choice of timber on strength basis for column and posts: |
high compressive strength and adequate stiffness |
|
|
dressed dimensions for 4 inches or less: |
dressed dimension = normal dimension - 3/8" |
|
|
dressed dimensions for greater than 4 inches: |
dressed dimension = normal dimension - 1/2" |
|
|
refers to how many sides have been pre-surfaced |
SxS designation |
|
|
a measurements of three dimensions to determine volume |
board feet |
|
|
unit of measurement for timber; unit of volume |
boardfoot |
|
|
constructed assembly of joints separated by members |
structure |
|
|
in timber engineering, critical factor in the design of the structure |
joint/s |
|
|
three main parameters which influence the load bearing capacity behaviour of joints with dowel type fasteners (3) |
bending capacity of the dowel or yield moment embedding strength of the timber or wood based material withdrawal strength of the dowel |
|
|
load transferring devices which rely on bolts or lag screws to restrain the joint assembly |
timber connectors |
|
|
more efficient structurally than bolts or lag screws used alone bcs they enlarge the wood area over which a load is distributed |
timber connectors |
|
|
generally stiffer, requires less timber and have a better appearance than mechanically fastened connections |
structural glued joints |
|
|
resistant to corrosive atmospheres |
structural glued joints |
|
|
safer in fire than mechanically fastened connections |
joints made with thermosetting resins |
|
|
advantages of structural glued joints |
stiffer better appearance resistant to corrosion |
|
|
disadvantages of structural glued joints |
requires stringent quality control unsuitable in conditions of fluctuating moisture content if dissimilar materials are involved or if there is a change in grain at their interfaces unsuitable if there is a significant component of load perpendicular to the plane of adhesion |
|
|
dowel type fasteners with heads and nuts |
bolts |
|
|
circular rods of timber, steel, or carbon reinforced plastics |
dowels |
|
|
dowels are driven into identically or marginally ________ holes |
undersized |
|
|
used in timber constructions to transmit high forces |
joints with dowels |
|
|
economic type of joint which is easy to produce |
dowels |
