ANGUS JOHN

Pull out failures at the connections of roofing

structures under wind uplift

EuroCode EN 1993-1-3

If tsup / s < 1: Fo,Rd = 0,45 d tsup fu,sup / gM2

If tsup / s 1: Fo,Rd = 0,65 d tsup fu,sup / gM2

Table 8.2

AS 4600 2005

Nou = 0.85t2df fu2 for t2 > 0.9 mmCl 5.4.3.2(2)

Resuts

PurlinPurlin Thickness (mm) Screw Name

Screw Thickness (mm) Gauge TPI Mean Min

10010 112g 14 5.512g 14 2444.165 2205.783

10010 110g 16 4.810g 16 1688.91 1674.372

10010 114g 20 6.814g 20 1323.499 828.2688

10010 114g 10 6.814g 10 2316.92 2248.442

10010 1BattenZips 12g 11 1792.915 1673.441

10010 1Roofzips Roofzips 11 2785.908 2785.908

15012 1.210g 16 4.810g 16 2007.277 1923.76

15012 1.212g 14 5.512g 14 1903.147 1391.516

15012 1.214g 10 6.814g 10 2669.011 2567.186

15012 1.214g 20 6.814g 20 1840.569 1612.679

15012 1.2BattenZips 12g 11 2490.172 2339.495

15015 1.510g 16 4.810g 16 2274.155 1823.932

15015 1.512g 14 5.512g 14 2688.982 2531.847

Isolation of Variables

0.9 1 1.1 1.2 1.3 1.4 1.5 1.60

500

1000

1500

2000

2500

f(x) = 1148.31355701755 x + 573.860395789465R² = 0.972790295110769

Purlin Thickness comparison of 10g 16 Screws

10g 16 ScrewsLinear (10g 16 Screws)

Purlin Thickness

Tens

ion

(N)

8 10 12 14 16 18 20 220

500

1000

1500

2000

2500f(x) = − 99.342044875 x + 3310.34028875R² = 1

TPI comparison of 10010 14g Screws

14g ScrewsLinear (14g Screws)

TPI

Mea

n Te

nsile

Str

engt

h (N

)

1 2 Mean0

500

1000

1500

2000

2500

3000

15015 12g 14

Max Tension / 2

Test #

5 235 465 695 925 11551385161518452075230525352765299532253455368539154145437546054835

-1000

0

1000

2000

3000

4000

5000

6000

7000

15015 12g 14

Test 1Test 2

Improvments