Fell 2017 Structural and Sito Plans Homework 4 Superstructure-Wood 1· [20 Polits
ID: 1711998 • Letter: F
Question
Fell 2017 Structural and Sito Plans Homework 4 Superstructure-Wood 1· [20 Polits! Answerthe following questions from the roading ass Due: Septomber 28, 2017 posted on Blackboard (The solutions to section no. and name): tals of Bullding Construction 1 must be typed format; remember to Include your Toplc: Wood Construction 1. Chapter 3, pg. 130, Review Questions 1-10. 2. Chapter 4, pg. 159, Review Questions 1-3 '3. Chapter 5, pg. 219, Review Questions 3-7 2. [10 Points] Answer the following based on the assigned reading in Ching a. Refer to the Lumber reading 12.13, sketch an example of a lumber grade mark and identify the meanings of each item. Refer to Chapter 12. In the Structural grading of a wood piece what are knots restricted by b. c. Refer to Chapter 5.47 How many feet are wood columns assumed to have an unsupported height of? d. Refer to Balloon Framing (Chapter 5); list 4 factors to consider in the selection for stud wall frames. on no. and name):Explanation / Answer
2 a) Figre has been attached.
M -
L
A
5
S-P-F-----1
STUD-----------2
KD-HT-----------3
25 NLGA -------4
1.Species
Denotes the wood's species or a group of species with similar strengths.
The abbreviations for framing-grade softwoods, from strongest to weakest, are as follows:
Doug Fir, D Fir- L: Douglas fir (L=western larch)
SYP: Southern pine
Hem, Hem-fir, H-F: Hemlock or fir
S-P-F: Spruce, pine, or fir
2. Grade signifies the quality of the lumber. It is denoted as "Select Structural" (highest strength, best appearance) or No. 1, No. 2, and No. 3 (lowest strength, not pretty). As the numbers go up, quality and price go down. "Stud" is a fifth designation, meaning it's good for a load-bearing wall.
3. Moisture Content . If the wood is marked as AD (Air Dried) or S-GRN, it signifies unseasoned 'Green' lumber, having the moisture content of 19% or more. Kiln-dried (KD) or surface-dry (S-DRY) lumber, which has a moisture content between 16 and 19 percent. KD-HT means the wood was also heat treated to kill pests, a requirement for imported lumber.
4. Certification Mark helps in the identification of the agency that looks after the grading. In this case the agency is called National Lumber Grades Authority.
5. Mill denotes the number or the trademark of the mill.
2b) Structural Steel : Knobs are firm, sound and encased. Pith knots are permitted if they are tight and well spaced, are permitted in sizes not to exceed the following, or equivalent displacement. (Table 1)
No 1: Knobs are firm, sund and encased. Pith knots are permitted if they are tight and well spaced, are permitted in sizes not to exceed the following, or equivalent displacement. (Table 2)
No 2: Well spaced knots of any quality are permitted in sizes not to exceed the ones given in Table 3.
No.3: Well spaced knots of any quality are permitted in the sizes or their equivalent displacementgiven in Table 4
Construction: Knobs are firm, sound and encased. Pith knots are permitted if they are tight and well spaced, are permitted in sizes not to exceed the following, or equivalent displacement. (Table 5).
Standard: They are not restricted by quality and are permitted in the f sizes or their equivalent displacement given in Table 6.
Utility:They are not restricted by quality and are permitted in the f sizes or their equivalent displacement given in Table 7.
Studs: They are not limited by quality but are well spaced and are permitted in the sizes or their equivalent displacement as given in Table 8.
c)
M -
L
A
5
S-P-F-----1
STUD-----------2
KD-HT-----------3
25 NLGA -------4
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.