Connection Design Examples - awc.org€¦ · DES 345 –Connection Design Examples NDS CH. 12...
Transcript of Connection Design Examples - awc.org€¦ · DES 345 –Connection Design Examples NDS CH. 12...
Connection Design ExamplesUsing the 2015 NDS (DES345)
Lori Koch, P.E.Manager, Educational OutreachAmerican Wood Council
Adam Robertson, M.A.Sc., P.Eng.Manager, Codes and StandardsCanadian Wood Council
DES 345 – Conne c t i o n De s i g n E x amp l e s
COURSE DESCRIPTION
With the variety of fasteners available for wood construction, this presentation will provide a basic understanding of connections that includes design examples based on the 2015 National Design Specification® (NDS®) for Wood Construction. Solutions for nailed, screwed, and bolted connections will be presented, along with specific information on calculating shear capacity as well as withdrawal capacity. Multiple approaches to calculating capacity will be discussed, including tabulated references, calculation-based techniques, and computer program solutions (including WoodWorks® Connections software). Material properties for fasteners as well as connected materials including wood-to-wood, wood-to-steel, and wood-to-concrete will be discussed.
Disclaimer: Portions of this presentation were developed by a third party and are not funded by American Wood Council or the Softwood Lumber Board.
DES 345 – Conne c t i o n De s i g n E x amp l e s
Participants may download the presentation here: http://www.awc.org/education/resources
The American Wood Council is a Registered Provider with The American Institute of Architects Continuing Education Systems (AIA/CES), Provider # 50111237.
Credit(s) earned on completion of this course will be reported to AIA CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request.
This course is registered with AIA CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product.
Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
DES 345 – Conne c t i o n De s i g n E x amp l e s
LEARNING OBJECTIVESUpon completion, participants will be better able to identify:
Be familiar with NDS provisions for fastener withdrawal capacity and NDS and TR-12 provisions for fastener shear capacity
Withdrawal and Shear Loading
Learn various approaches in the NDS for calculating fastener capacity
NDS-based Calculations
Understand the 6 lateral design value yield modes and material properties used to calculate capacity
Lateral Yield Modes
Understand the types of connections WoodWorks® software designs, how to use the software, how to view the design results and the connection drawing output
Software-based Solutions
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DES 345 – Conne c t i o n De s i g n E x amp l e s
OUTLINE
NDS Provisions on Connection Design
Introduction
Force is applied parallel to the length of the fastener
Withdrawal Examples
Force is applied perpendicular to the length of the fastener
Shear Examples
Examples using WoodWorks® software
Computer Aided Solutions
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POLLING QUESTION
What is your profession?a) Engineerb) Architectc) Building Officiald) Other
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DES 345 – Conne c t i o n De s i g n E x amp l e s
NDS CH. 11 – MECHANICAL CONNECTIONS
Design issues
Reference design valuesChapter 12 – dowel-type connectors (nails, bolts, lag/wood screws)
Chapter 13 – split rings and shear plates
Chapter 14 – timber rivets
Adjustment factors
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NDS CH. 11 – MECHANICAL CONNECTIONS
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NDS CH. 12 – DOWEL-TYPE FASTENERS
Withdrawal Equations for Dowel-Type Fasteners
• Lag screws W = 1800 G3/2 D3/4
• Wood screws W = 2800 G2 D
• Smooth shank nails (bright or galvanized carbon steel)W = 1380 G5/2 D
• Post-frame ring shank nails W = 1800 G2 D
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NDS CH. 12 – DOWEL-TYPE FASTENERS
Withdrawal Penetration
• Lag screws Do NOT include length of tapered fastener tip in penetration
• Wood screws, Nails/Spikes Include length of tapered fastener tip in penetration
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NDS CH. 12 – DOWEL-TYPE FASTENERS
Withdrawal based on inches of penetration into main member
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WITHDRAWAL EXAMPLES
Withdrawal examples
• Smooth shank nail
• Lag screw
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Withdrawal Design Value - Plain Shank Nail
Using 2015 NDS section 12.2, calculate the Allowable Stress Design (ASD) referencewithdrawal capacity of an 8d common plain shank nail in the connection below: Main member: Spruce-Pine-Fir Nominal 4x (Actual dimension 3.5 in.) (G = 0.42)
Side member: 12 gage (0.105 in. thick) ASTM A653 Grade 33 steel side plate Fastener Dimensions: 8d nail (NDS Table L4) Length = 2.5 in. Diameter = 0.131 in.
D 0.131 Fastener diameter (in.)
G 0.42 Specific gravity (NDS Table 12.3.3A)
L 2.5 Nail Length (in.)
Ls 0.105 Side Member thickness (in.)
pt L Ls Nail penetration into main member (in.)
pt 2.395
W 1380 G
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2 D NDS Equation 12.2-3
W 20.7 Reference withdrawal design value. Compare to NDS Table12.2C, W = 21 lbs/in
Resistance pt W Resistance based on main member penetration (lbs)
Resistance 49 AWC Online Connection Calculator gives identical result of 49 lbs
See NDS Table 11.3.1 for application of additional adjustment factors for connections based onend use conditions.
Withdrawal Design Value - Lag Screw
Using 2015 NDS provisions (NDS 12.2) calculate the Allowable Stress Design (ASD) withdrawalcapacity of a lag screw in the connection below: Main member: Southern Pine Nominal 6x (Actual thickness = 5.5 in.) (G = 0.55) (NDS Table 12.3.3A) Side member: Southern Pine Nominal 2x (Actual thickness = 1.5 in.) (G = 0.55) (NDS Table 12.3.3A) Fastener Dimensions: 1/2 in. diameter lag screw (NDS Table L2) Length = 4 in. Tip Length = 0.3125 in.
D 0.5 Fastener diameter (in.)
tip 0.3125 Fastener tapered tip length (in.)
G 0.55 Specific gravity (NDS Table 12.3.3A)
L 4 Lag screw length (in.)
Ls 1.5 Side Member thickness (in.)
pt L Ls tip Lag screw penetration into main member (in.)
pt 2.188
W 1800 G
3
2 D
3
4 NDS Equation 12.2-1
W 436.6 Compare to NDS Reference Withdrawal Design Value Table12.2A, W = 437 lbs/in.
Resistance pt W Resistance based on main member penetration (lbs)
Resistance 955 AWC Online Connection Calculator gives identical result of 955 lbs
See NDS Table 11.3.1 for application of additional adjustment factors for connections based on enduse conditions.
DES 345 – Conne c t i o n De s i g n E x amp l e s
NDS CH. 12 – DOWEL-TYPE FASTENERS
•4 Yield Modes•6 Yield Equations•Single & Double Shear•Wood-to-Wood•Wood-to-Steel•Wood-to-Concrete
Members must be in contact at shear plane – NO GAPS!
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YIELD MODES
MODE I• bearing-dominated yield of
wood fibers
MODE II• pivoting of fastener with
localized crushing of wood fibers
MODE III•fastener yield in bending at one plastic hinge and localized crushing of wood fibers
MODE IV• fastener yield in bending at
two plastic hinges and localized crushing of wood fibers
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POLLING QUESTION
The NDS Yield Limit Equations for Modes II and IIIm do not apply to Single Shear connections.a) Trueb) False
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DOWEL BEARING STRENGTH
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FASTENER BENDING YIELD STRENGTH
Load
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FASTENER BENDING YIELD STRENGTH
Fastener Bending Yield Strength (Fyb) sources:• NDS Appendix I• TR-12 Appendix A• Manufacturer’s data• ICC Evaluation Service Report• ASTM F1667 Appendix
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NDS CH. 12 – DOWEL-TYPE FASTENERS
New
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NDS CH. 12 – DOWEL-TYPE FASTENERS
New
Non-uniform for
CLT
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• Adjust lm or ls to compensate for orthogonal grain orientations in adjacent layers
• Parallel to grain: Fe/FeǁExample: ½” bolt in southern pine 3-ply CLT
with 1-½” laminationslm = t1ǁ + t2 + t3ǁ = 3(1.5) = 4.5”lm-adj = t1ǁ + t2(Fe/Feǁ) + t3ǁ
=1.5 +1.5(3650/6150) +1.5 = 3.9”
NDS CH. 12 – DOWEL-TYPE FASTENERS
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NDS CH. 12 – DOWEL-TYPE FASTENERS
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NDS CH. 12 – DOWEL-TYPE FASTENERS
Threaded length < lm/4 lm
Dia. Fastener = D
Dia. Fastener = D
Threaded length < lm/4 lm
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NDS CH. 12 – DOWEL-TYPE FASTENERS
Dia. Fastener = Dr
NDS Chapter 12 Tables use: • Dr for lateral yield equations for lag screws and wood screws • D for bolts
lm
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FASTENER BEARING LENGTH
Tapered tip length, E:• Dimensions for Lag Screws in NDS Appendix L• Wood screws, Nails/Spikes
• Tip length, E = 2D• Bearing length = penetration – E/2• 6D minimum penetration for nails*, spikes, wood screws• 4D minimum penetration for lag screws
*Exception for double shear connections with clinched nails, D ≤ 0.148”
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http://www.awc.org/publications/TR/index.php
TECHNICAL REPORT 12
Provide tools for the analysis of• gaps between members• various fastener bending moment configurations• fasteners through hollow members• fasteners with tapered tips
Provides mechanics-based approach to Lateral Connection Design
Calculate “P” value with TR-12 equations• divide by Rd (NDS Table 12.3.1B) to get “Z” equal to NDS values
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http://www.awc.org/publications/TR/index.php
TECHNICAL REPORT 12
• Provides design values inputs for various materials
• Dowel bearing strengths (Fe)
• Fastener bending yield strengths (Fyb)
TR-12 Appendix A
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SINGLE SHEAR NAIL EXAMPLE
Compare to NDS Table 12N value:Z = 121 lbs
Nail Size 10d Mode Im 785
Diameter (in.) 0.148 Mode Is 280
Fyb (psi) 90000 Mode II 262
Length (in.) 3 Mode IIIm 272
Mode IIIs 121Mode IV 128
Main Member Thickness (in.) 2.5Main Member Species Southern Pine Z (lbs) = 121Main Member Dowel Bearing Strength (Fem) (psi) 5550
Side Member Thickness (in.) 0.75Side Member Species Southern Pine Side Member Dowel Bearing Strength (Fes) (psi) 5550
Side Member Bearing Length (Ls) (in.) 0.75Main Member Penetration (p) (in.) 2.25Tapered Tip Length (E) (in.) 0.296Main Member Bearing Length (Lm) (in.) 2.102
Calculated Inputs
Yield Mode CalculationsSingle Nail ‐ Single ShearNail Properties
Main Member Properties
Side Member Properties
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SHEAR EXAMPLES
Additional shear examples
• Smooth shank nail – single shear
• Wood Screw – double shear
• Bolt – single shear
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Single Common Nail Lateral Design Value - Single Shear Wood-to-wood Connection Using the 2015 NDS yield limit equations in section 12.3, determine the Allowable StressDesign (ASD) reference lateral capacity of a single shear connection with the followingconfiguration:
Main member Nominal 3x Southern Pine (Actual thickness = 2.5 in.) (G = 0.55) (NDS Table 12.3.3A)
Side member Nominal 1x Southern Pine (Actual thickness = 0.75 in.) (G = 0.55) (NDS Table 12.3.3A) Fastener Dimensions: 10d Common Nail (NDS Table L4) D = 0.148 in. Length = 3 in.
Define parameters:
Fem 5550 Main member Dowel Bearing Strength (NDS Table 12.3.3) (psi)
Fes 5550 Side member Dowel Bearing Strength (NDS Table 12.3.3) (psi)
Re
Fem
Fes
Re 1
Fyb 90000 Fastener dowel bending yield strength (psi) (NDS Table I1)
D 0.148 Nail Diameter (in.)
Tip 2 D Length of tapered fastener tip (in.) (NDS 12.3.5.3b)
Ls 0.75 Side member Dowel Bearing Length (in.) (NDS 12.3.5)
Lm 3 LsTip
2 Main member Dowel Bearing Length (in.) (NDS 12.3.5.3)
Lm 2.1
NDS 12.1.6.5 Requires minimum main member penetration equal to 6D, Lm > 0.89 in.
Rd 2.2 Reduction Term (NDS Table 12.3.1B)
Calculate k 1 , k 2 , and k 3 (NDS Table 12.3.1A)
Rt
Lm
Ls Rt 2.803
k1
Re 2 Re2
1 Rt Rt2
Rt
2Re
3
Re 1 Rt
1 Re
k1 0.935
k2 1 2 1 Re 2 Fyb 1 2 Re D
2
3 Fem Lm2
k2 1.04
k3 12 1 Re
Re
2 Fyb 2 Re D2
3 Fem Ls2
k3 1.294
Yield Mode Calculations (NDS Table 12.3.1A)
Mode Im
ZIm
D Lm Fem
Rd
ZIm 785 Yield Mode Im Solution (lbs)
Mode Is
ZIs
D Ls Fes
Rd
ZIs 280 Yield Mode Is Solution (lbs)
Mode II
ZII
k1 D Ls Fes
Rd
ZII 262 Yield Mode II Solution (lbs)
Mode IIIm
ZIIIm
k2 D Lm Fem
1 2 Re Rd
ZIIIm 272 Yield Mode IIIm Solution (lbs)
Mode IIIs
ZIIIs
k3 D Ls Fem
2 Re Rd
ZIIIs 121 Yield Mode IIIs Solution (lbs)
Mode IV
ZIVD2
Rd
2 Fem Fyb
3 1 Re
ZIV 128 Yield Mode IV Solution (lbs)
Zdist
ZIm
ZIs
ZII
ZIIIm
ZIIIs
ZIV
Zdist
785
280
262
272
121
128
Creating an array with all Yield Mode Solutions
Z min Zdist
Z 121 Minimum value of all Yield Modes provides Z reference lateraldesign value (lbs). Mode IIIs controls. Compare to NDS Table 12Nvalue = 121 lbs. See NDS Table 11.3.1 for application ofadditional adjustment factors for connections based on end useconditions.
Single Wood Screw Lateral Design Value - Double Shear Wood-to-wood Connection Using 2015 NDS yield limit equations in section 12.3, determine the allowable stress designreference lateral design value of a double shear connection with the following configuration:
Main member Actual 3 in. Structural Composite Lumber Member (G = 0.5) (NDS 12.3.3.3)
Side members Nominal 2x Douglas Fir-Larch (DF-L) (Actual thickness = 1.5 in.) (G = 0.5) (NDS 12.3.3A)
Fastener Dimensions: Number 10 Wood Screw (NDS Table L3) D = 0.19 in. Dr= 0.152 in. Length = 6 in.
Define parameters:
Fem 4650 Main member Dowel Bearing Strength (NDS Table 12.3.3) (psi)
Fes 4650 Side member Dowel Bearing Strength (NDS Table 12.3.3) (psi)
Re
Fem
Fes Re 1
tm 3.0 Main Member thickness (in.)
ts 1.5 Side Member thickness (in.)
Fyb 80000 Fastener dowel bending yield strength (psi) (NDS Table I1)
D 0.19 Screw Diameter (in.)
Dr 0.152 Screw Root Diameter (in.)
Lscrew 6 Screw Length (in.)
Tip 2 D Length of tapered fastener tip (in.) (NDS 12.3.5.3b)
Lm tm Lm 3 Main member Dowel Bearing Length (in.) (NDS 12.3.5.3)
Ls Lscrew Lm tsTip
2 Side member Dowel Bearing Length (in.) (NDS 12.3.5)
Ls 1.31 NDS 12.1.5.6 requires minimum 6D penetration, Ls>1.14 in.
Rd 10D 0.5 Rd 2.4 Reduction Term (NDS Table 12.3.1B)
Calculate k 3 (NDS Table 12.3.1A) (k 1 and k 2 not used)
k3 12 1 Re
Re
2 Fyb 2 Re Dr2
3 Fem Ls2
k3 1.113
Yield Mode Calculations (NDS Table 12.3.1A)
Mode Im
ZIm
Dr Lm Fem
Rd
ZIm 883 Yield Mode Im Solution (lbs)
Mode Is
ZIs
2Dr Ls Fes
Rd
ZIs 772 Yield Mode Is Solution (lbs)
Mode IIIs
ZIIIs
2k3 Dr Ls Fem
2 Re Rd
ZIIIs 286 Yield Mode IIIs Solution (lbs)
Mode IV
ZIV
2Dr2
Rd
2 Fem Fyb
3 1 Re
ZIV 214 Yield Mode IV Solution (lbs)
Zdist
ZIm
ZIs
ZIIIs
ZIV
Zdist
883
772
286
214
Creating an array with all Yield Mode Solutions
Z min Zdist
Z 214 Minimum value of all Yield Modes provides Z reference lateral designvalue (lbs). Mode IV controls. There are no tabulated values in the NDSto compare. See NDS Table 11.3.1 for application of additionaladjustment factors for connections based on end use conditions.
Single Bolt Lateral Design Value - Single Shear Wood-to-Wood Connection Using the 2015 NDS Yield Limit Equations (NDS 12.3), determine the Allowable StressDesign (ASD) reference lateral capacity of a single shear connection with the followingconfiguration:
Main member Nominal 4x Hem-Fir (Actual thickness = 3.5")
Side member Nominal 4x Hem-Fir (Actual thickness = 3.5") Both members loaded parallel to grain G = 0.43 for Hem-Fir (NDS Table 12.3.3A)
Fastener Dimensions: 1/2 in. diameter bolt 8 in. Bolt with 1.5 in. thread length (NDS Table L1)
Define parameters:
Fem 4800 Main member Dowel Bearing Strength (NDS Table 12.3.3) (psi)
Fes 4800 Side member Dowel Bearing Strength (NDS Table 12.3.3) (psi)
Re
Fem
Fes
Re 1
Fyb 45000 Fastener dowel bending yield strength (psi) (NDS Table I1)
D 0.5 Bolt Diameter (in.)
Per NDS 12.3.7.2, check that threads are less than 1/4 the bearing length in the member holdingthe threads. In this case, 3.5 in./4 > 0.5 in. Therefore, OK to use D instead of Dr in calculations.
Ls 3.5 Side member Dowel Bearing Length (in.) (NDS 12.3.5)
Lm 3.5 Main member Dowel Bearing Length (in.) (NDS 12.3.5)
Rd1 4.0
Rd2 3.6 Reduction Terms (NDS Table 12.3.1B)
Rd3 3.2
Calculate k 1 , k 2 , and k 3 (NDS Table 12.3.1A)
Rt
Lm
Ls Rt 1
k1
Re 2 Re2
1 Rt Rt2
Rt
2Re
3
Re 1 Rt
1 Re
k1 0.414
k2 1 2 1 Re 2 Fyb 1 2 Re D
2
3 Fem Lm2
k2 1.093
k3 12 1 Re
Re
2 Fyb 2 Re D2
3 Fem Ls2
k3 1.093
Yield Mode Calculations (NDS Table 12.3.1A)
Mode Im
ZIm
D Lm Fem
Rd1
ZIm 2100 Yield Mode Im Solution (lbs)
Mode Is
ZIs
D Ls Fes
Rd1
ZIs 2100 Yield Mode Is Solution (lbs)
Mode II
ZII
k1 D Ls Fes
Rd2
ZII 966 Yield Mode II Solution (lbs)
Mode IIIm
ZIIIm
k2 D Lm Fem
1 2 Re Rd3
ZIIIm 957 Yield Mode IIIm Solution (lbs)
Mode IIIs
ZIIIs
k3 D Ls Fem
2 Re Rd3
ZIIIs 957 Yield Mode IIIs Solution (lbs)
Mode IV
ZIVD2
Rd3
2 Fem Fyb
3 1 Re
ZIV 663 Yield Mode IV Solution (lbs)
Zdist
ZIm
ZIs
ZII
ZIIIm
ZIIIs
ZIV
Creating an array with all Yield Mode Solutions
Minimum value of all Yield Modes provides Z reference lateraldesign value (lbs). Mode IV controls.Z min Zdist Z 663
Repeat same problem, but solve using Technical Report 12 - General Dowel Equations for Calculating Lateral Connection Values (TR-12) Equations for comparison
qs Fes D Side member dowel bearing resistance, lbs/in.
qm Fem D Main member dowel bearing resistance, lbs/in.
Side and Main member dowel resistance (equal due to equivalent doweldiameter in both members), in.-lbsM
Fyb D3
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gap 0 Gap between member shear planes, in.
The limiting wood stresses used in the yield model are based on the load at which theload-deformation curve from a fastener embedment test intersects a line represented by theinitial tangent modolus offset 5%of the fastener diameter. The reduction term, Rd, reduces thevalues calculated using the yield limit equations to approximate estimates of the nominalproportional limit design valuesin previous NDS editions.
Yield Mode Calculations (TR-12 Table 1-1)
Mode Im
PIm qm Lm
TR-12 Yield Mode Im Solution (lbs)PIm 8400
Mode Is
PIs qs Ls
TR-12 Yield Mode Is Solution (lbs)PIs 8400
Mode II
AII1
4 qs
1
4 qm
BII
Ls
2gap
Lm
2
CII
qs Ls2
4
qm Lm2
4
PII
BII BII2
4 AII CII
2 AII
PII 3479 TR-12 Yield Mode II Solution (lbs)
Mode IIIm
AIIIm1
2 qs
1
4 qm
BIIIm gapLm
2
CIIIm Mqm Lm
2
4
PIIIm
BIIIm BIIIm2
4 AIIIm CIIIm
2 AIIIm
PIIIm 3062 TR-12 Yield Mode IIIm Solution (lbs)
Mode IIIs
AIIIs1
4 qs
1
2 qm
BIIIs gapLs
2
CIIIs Mqs Ls
2
4
PIIIs
BIIIs BIIIs2
4 AIIIs CIIIs
2 AIIIs
PIIIs 3062 TR-12 Yield Mode IIIs Solution (lbs)
Mode IV
AIV1
2 qs
1
2 qm
BIV gap
CIV M M
PIV
BIV BIV2
4 AIV CIV
2 AIV
PIV 2121 TR-12 Yield Mode IV Solution (lbs)
Converting from TR-12 "P" values to NDS "Z"values and creating an array. Shows TR-12results equal NDS results for each YieldMode. All values in units of lbs.
Zdist2
PIm
Rd1
PIs
Rd1
PII
Rd2
PIIIm
Rd3
PIIIs
Rd3
PIV
Rd3
Zdist2
2100
2100
966
957
957
663
Z2 min Zdist2 Z value from TR-12 equations is equivalent to Z value from NDSequations and comparable to NDS Table 12A value Zparallel = 660lb. See NDS Table 11.3.1 for application of additional adjustmentfactors for connections based on end use conditions.
Z2 663
Zdist is NDS equation result, Zdist2 isTR-12 equation result, for Modes Im,Is, II, IIIm, IIIs, and IV, respectively. Allvalues in units of lbs.
Zdist
2100
2100
966
957
957
663
Zdist2
2100
2100
966
957
957
663
DES 345 – Conne c t i o n De s i g n E x amp l e s
POLLING QUESTION
Technical Report 12 can be used to calculate a dowel‐type connection’s:a) Reference withdrawal design valuesb) Reference lateral design values c) Combined lateral and withdrawal reference
design valuesd) Maximum fastener sizes
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2018 NDS CHANGES – WHAT’S COMING?
Revised withdrawal equations for deformed-shank nails
Inclusion of Roof Sheathing Ring Shank (RSRS) nail
Removal of generic threaded nail withdrawal provision
New equation for stainless steel smooth shank nails
Round-head fastener pull-through
December webinar on 2018 NDS changes!
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WOODWORKS DESIGN OFFICE 11 SOFTWARE
SHEARWALLS
CONNECTIONS
SIZERGravity Design
Lateral Design (Wind and Seismic)
Fasteners
Concept mode
Column modeBeam mode
DATABASE EDITORAdd proprietary products
woodworks-software.com32
DES 345 – Conne c t i o n De s i g n E x amp l e s
SINGLE SHEAR NAIL EXAMPLE
Choose connection geometry:
Lapped shearWood-to-woodSplice, two member
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SINGLE SHEAR NAIL EXAMPLE
Choose fastener type:
Nails
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SINGLE SHEAR NAIL EXAMPLE
Specify properties of main member:
Database editor
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SINGLE SHEAR NAIL EXAMPLE
Database editor:
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SINGLE SHEAR NAIL EXAMPLE
Specify properties of side member:
Database editor
Manual input section sizes37
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SINGLE SHEAR NAIL EXAMPLE
Specify additional parameters:
Wet service factor (CM)
Temperature factor (Ct)
Fire retardant treatment (Cft)(Unique to WoodWorks –not in NDS)Frequently used load duration factor (CD)
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SINGLE SHEAR NAIL EXAMPLE
Specify fastener properties:
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SINGLE SHEAR NAIL EXAMPLE
Preliminary connection layout:
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SINGLE SHEAR NAIL EXAMPLE
Results:
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SINGLE SHEAR NAIL EXAMPLE
Results:
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SINGLE SHEAR BOLT EXAMPLE
Choose connection geometry:
Lapped shearWood-to-woodSplice, two member
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SINGLE SHEAR BOLT EXAMPLE
Choose fastener type:
Bolts
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SINGLE SHEAR BOLT EXAMPLE
Specify properties of main and side members:
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SINGLE SHEAR BOLT EXAMPLE
Specify additional parameters:
Wet service factor (CM)
Temperature factor (Ct)
Fire retardant treatment (Cft) (Unique to WoodWorks –not in NDS)Frequently used load duration factor (CD)
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DES 345 – Conne c t i o n De s i g n E x amp l e s
SINGLE SHEAR BOLT EXAMPLE
Specify fastener properties:
47
DES 345 – Conne c t i o n De s i g n E x amp l e s
SINGLE SHEAR BOLT EXAMPLE
Preliminary connection layout:
48
DES 345 – Conne c t i o n De s i g n E x amp l e s
SINGLE SHEAR BOLT EXAMPLE
Results:
49
DES 345 – Conne c t i o n De s i g n E x amp l e s
SINGLE SHEAR BOLT EXAMPLE
Results:
50
DES 345 – Conne c t i o n De s i g n E x amp l e s
SINGLE SHEAR BOLT EXAMPLE
Results:
51
DES 345 – Conne c t i o n De s i g n E x amp l e s
LAG SCREW WITHDRAWAL EXAMPLE
Choose connection geometry:
Post and BeamBeam-to-beamOne-sided
52
DES 345 – Conne c t i o n De s i g n E x amp l e s
LAG SCREW WITHDRAWAL EXAMPLE
Choose fastener type:
Lag screws
53
DES 345 – Conne c t i o n De s i g n E x amp l e s
LAG SCREW WITHDRAWAL EXAMPLE
Specify properties of main and side members:
54
DES 345 – Conne c t i o n De s i g n E x amp l e s
LAG SCREW WITHDRAWAL EXAMPLE
Specify additional parameters:
Wet service factor (CM)
Temperature factor (Ct)
Fire retardant treatment (Cft)(Unique to WoodWorks –not in NDS)Frequently used load duration factor (CD)
55
DES 345 – Conne c t i o n De s i g n E x amp l e s
LAG SCREW WITHDRAWAL EXAMPLE
Specify fastener properties:
56
DES 345 – Conne c t i o n De s i g n E x amp l e s
LAG SCREW WITHDRAWAL EXAMPLE
Preliminary connection layout:
57
Export to CAD file (.DXF format)
DES 345 – Conne c t i o n De s i g n E x amp l e s
LAG SCREW WITHDRAWAL EXAMPLE
Results:
58
DES 345 – Conne c t i o n De s i g n E x amp l e s
LAG SCREW WITHDRAWAL EXAMPLE
Results:
59
DES 345 – Conne c t i o n De s i g n E x amp l e s
LAG SCREW WITHDRAWAL EXAMPLE
Results:
60
DES 345 – Conne c t i o n De s i g n E x amp l e s
LAG SCREW WITHDRAWAL EXAMPLE
Results:
61
DES 345 – Conne c t i o n De s i g n E x amp l e s
ADDITIONAL CONNECTION TYPES
Wood-to-wood:
Wood-to-steel:
Wood-to-concrete:
Export as DXF
62
DES 345 – Conne c t i o n De s i g n E x amp l e s
WOODWORKS DESIGN OFFICE 11 SOFTWARE
SHEARWALLS
CONNECTIONS
SIZERGravity Design
Lateral Design (Wind and Seismic)
Fasteners
Concept mode
Column modeBeam mode
DATABASE EDITORAdd proprietary products
10% discount for AWC members
For more information contact:
63
DES 345 – Conne c t i o n De s i g n E x amp l e s
POLLING QUESTION
The WoodWorks Design Office software has versions for both US and Canadian standards. a) Trueb) False
64
DES 345 – Conne c t i o n De s i g n E x amp l e s
T h i s p r e s e n t a t i o n i s p r o t e c t e d b y U S a n d I n t e r n a t i o n a l C o p y r i g h t l a w s . R e p r o d u c t i o n , d i s t r i b u t i o n , d i s p l a y a n d u s e o f t h e p r e s e n t a t i o n w i t h o u t w r i t t e n p e r m i s s i o n o f A m e r i c a n W o o d C o u n c i l ( A W C ) i s
p r o h i b i t e d . © A m e r i c a n W o o d C o u n c i l 2 0 1 7
in [email protected] | www.awc.org
This concludes the American Institute of Architects Continuing Education Systems Course