CH. 10: WOODEN BEAMS Flashcards
(29 cards)
1
Q
- Structural element that carries transverse loads
A
WOODEN BEAMS
2
Q
-A piece of wood which is typically long and squared that can be used as a building material.
A
WOODEN BEAMS
3
Q
TYPES OF BEAMS:
A
- SIMPLE BEAM
- CANTILEVER BEAM
- CONTINUOUS BEAM
- OVERHANGING BEAM
- FIXED END BEAM
4
Q
SIMPLE BEAM TYPES:
A
a. JOIST
b. RAFTER
c. STRINGER
5
Q
– directly support the floor boards.
A
JOIST
6
Q
- wooden beam that supports the roofing in an inclined position.
A
RAFTER
7
Q
- the ties are placed in bridge construction longitudinally.
A
STRINGER
8
Q
- It is a beam with only one support, either left or right end, that carries loads or weights on the unsupported section.
A
CANTILEVER BEAM
9
Q
- It is a beam that is supported or rests on two or more supports.
A
CONTINUOUS BEAM
10
Q
- a beam that is almost similar to a simple beam where in it supported at two points however the loads are carried on the extended portion.
A
OVERHANGING BEAM
11
Q
- a beam in which both ends supports are fixed.
A
FIXED END BEAM
12
Q
- an extent of pressure due to the overlaid weight or due to the external forces acting on the wooden beam
A
BEAM LOADING
13
Q
TYPES OF LOAD:
A
- DISTRIBUTION OF THE WEIGHT IMPOSED
- LENGTH OF TIME WHEN WEIGHT ARE IMPOSED
14
Q
DISTRIBUTION OF THE WEIGHT IMPOSED:
A
A. CONCENTRATED LOAD
B. OVERHANGING LOAD
C. DISTRIBUTED LOAD
15
Q
- It is a load resting at any point in the entire length of the beam.
A
CONCENTRATED LOAD
16
Q
- It is a load resting on the extended portion of the beam.
A
OVERHANGING LOAD
17
Q
- The weights are spread over the entire length.
A
DISTRIBUTED LOAD
18
Q
DISTRIBUTED LOAD:
A
- UNIFORMLY DISTRIBUTED LOAD
- UNIFORMLY VARYING LOAD
19
Q
LENGTH OF TIME WHEN WEIGHT ARE IMPOSED:
A
A. STATIC LOAD
B. PERMANENT LOAD (DEAD LOAD)
C. SHOCK LOAD (IMPACT LOAD)
D. ROLLING LOAD
20
Q
- a load which gradually increases in magnitude upon a stationary beam.
A
STATIC LOAD
21
Q
- It is a load where the forces act over a long period of time with no increase in magnitude (floor joist).
A
PERMANENT LOAD (DEAD LOAD)
22
Q
- load that is suddenly applied (ex. Wooden bat that hits the ball).
A
SHOCK LOAD (IMPACT LOAD)
23
Q
- load resulting from weights in motion or a load that is moving (ex. Weight imposed on a bridge by moving vehicles).
A
ROLLING LOAD
24
Q
- refers to the reactions which the wooden beam has obtained because of applied forces.
A
MOMENT
25
- branch of mechanics that is concerned with the analysis of loads acting on physical systems (example is wood) that do not experience an acceleration, but rather, are in static equilibrium with their environment.
STATICS
26
THREE BASIC LAWS OF STATICS:
a. Σ𝑉=0 (sum of all vertical forces is equal to zero)
b. Σ𝐻=0 (sum of all horizontal forces is equal to zero)
c. Σ𝑀=0 (sum of all moments is equal to zero)
27
The sum of all vertical forces is equal to zero. The equation is : Σ𝑉=0
This equation states that all the forces acting up must equal all the forces acting down.
28
The sum of all horizontal forces is equal to zero. The equation is: Σ𝐻=0
This equation indicates that all the forces acting to the left must equal all the forces acting to the right.
29
The sum of all moments is equal to zero. The equation is: Σ𝑀=0
This equation involves rotation. It states that all the moments (or torques) trying to rotate an object in one direction must equal those trying to rotate it in the opposite direction.
