NDS WOOD

Question 1

What is the reference for soft wood and hardwood table?

Answer 1

NDS supplementary Table 2.3

Question 2

Where can I find the adjustment for reference values?
Load duration factor and temperature factor

Answer 2

2.3 NDS 2018

Question 3

What should be used for the frequently used load duration factor?

Answer 3

Use higher value

Conservative

Table 2.3.2

Question 4

Where can I find additional factors Cb, Cp, CL?

Answer 4

Chapter 3 NDS

Question 5

Effective length for bending members?

Answer 5

NDS Table 3.3.3

Question 6

Where can I find the beam stability factor? C_L

eqn 3.3-6

Answer 6

3.3.3.8

Question 7

What table contains the sawn lumber adjustment factor?

Answer 7

Table 4.3.1

Question 8

Where can I find nominal and minimum dressed sizes of lumber?

Answer 8

Table 1A

Question 9

What table contains standard dressed sawn lumber?

Answer 9

Table 1B

Question 10

Where can I find western species structural glulam?

Answer 10

Table 1C

Question 11

Where can I find southern pine structural glulam?

Answer 11

Table 1D

Question 12

What table contains hardwood/softwood tabulated information?

Answer 12

NDS Supplement Table 2.3

Majority of them are softwoods

Question 13

What does Table 2.3.3 refer to?

Answer 13

Temperature factor, Ct

Question 14

Where can I find information on bending members-shear?

Answer 14

3.4

Question 15

What table contains the adjustment factor for sawn lumber?

Answer 15

Table 4.3.1

Question 16

What does Table 4A-Supplement refer to?

Answer 16

Adjustment factor/Reference design values

Except for Southern Pine

Question 17

Where can I find specific gravity information?

Answer 17

NDS Supplement; Table 4A / NDS 12.3.3A

Question 18

Where can I find connection design information?

Answer 18

Chapter 11

Question 19

Where can I find shear and tension design information?

Answer 19

Chapter 12

Question 20

Split ring and shear plate connections?

Answer 20

Chapter 13

Question 21

Timber rivets(force perpendicular to grain)

Answer 21

Chapter 14

Question 22

Buckling length coefficient, Ke

Answer 22

NDS Annex G(Table G1)-use theoretical

Question 23

Density equation based on specific gravity?

Answer 23

NDS supplement 3.1.2

Question 24

distance parallel to grain to the end of member?

Answer 24

End distance.

Question 25

distance perpendicular to the grain to the end of the member?

Answer 25

Edge distance.

Question 26

line of bolts/connection parallel to the direction of load is called ___________?

Answer 26

number of rows

Question 27

spacing of bolts/connection?

Answer 27

distance between fasteners along rows?

Question 28

<5" size wood is called _______?

Answer 28

Lumber

Question 29

C_L=__? when beam is bending through minor axis?

Answer 29

1 | C_L is only considered for compression region.

Question 30

Flat use factor(C_fu) is used when?

Answer 30

Beam/Member is loaded in minor axis bending?

Question 31

C_L and C_V modification factor is used either at once? True or false.

Answer 31

True

Question 32

Effective length for bending members as per table 3.3.3 is considered at compression or tension side?

Answer 32

Compression side | since this is related to compression buckling.

Question 33

Wet Service factor Cm is shown in?

Answer 33

Chapter 4 of NDS Supplementary, just before the table. | 4A-4B (Lumber) 4D(Timber) 5A-5B(Glulam)

Question 34

F_bE from equation 3.3-6 is?

Answer 34

F_bE=(1.20*E'_min)/(R_B^2) | R_B is slenderness ratio for bending members.

Question 35

Moisture boundary condition for sawn lumber

Answer 35

<19%

Question 36

Moisture boundary condition for Glue lam?

Answer 36

<16% ## Footnote G is similar to 6 so 16% (to remember)

Question 37

When calculating the C_L factor which E_min will you take?

Answer 37

E_min,y | Minor axis bending since it is beam stability factor(which considers maj

Question 38

Slenderness ratio for bending members, R_B shall not exceed ___?

Answer 38

50 | NDS (3.3-5)

Question 39

Repetitive member C_r criteria to satisfy?

Answer 39

-2"-4" thick dimensional lumber -at least three or more repeated members. -Spacing <= 24" -member are joined by sheathing or other load distribution element | NDS 4.3.9

Question 40

Buckling stiffness factor is equal to 1, when?

Answer 40

Compression chord member is >4" | NDS 4.4.2

Question 41

Table 4E in NDS supplement already accounts which factor?

Answer 41

Flat wise use factor, C_fu

Question 42

when calculating buckling stress, as per NDS 3.7.1, F_CE=0.822*E'_min/(l_e/d)^2 which direction buckling governs? x or y?

Answer 42

smaller of E'_x,min/(lex/dy)^2 and E'_y,min/(ley/dx)^2 d_y is parallel to y axis. | d_x is length parallel to the x axis. d_y is length parallel to the y ax ## Footnote Do not forget to consider effective length from Annex G(not to confuse with bending effective length of table 3.3.3)

Question 43

Shear stress in wood members is _____ ?

Answer 43

f_v=VQ/(Ib) or f_v=3*V/(2*b*d) | NDS 3.4.2 ## Footnote for notch use 3.4.3.2

Question 44

Where should one look for Nail Details in NDS?

Answer 44

Appendix L table L4. | NDS Main body.

Question 45

Lag screw peneteration requirement? Nails peneteration requirement?

Answer 45

-Lag screw 4D-8D -Nails 6D-10D | Table 12J footnote for lag screw, Table 12M(woodscrew) and 12N footnote

Question 46

Recommended spacing for Nails

Answer 46

Table C 12.1.6.6 | Commentary section of the NDS.