5000
Boeing 757
MD DC 9
4000
3000
2000
1000
σ H = 7.03 x A T
r 2 = 0.7
0
200
400
600
Total Basin Area (mm 2 )
Figure 35. Linear relationship between total basin area and maxi-
mum horizontal tensile stress at bottom of PCC Layer.
5000
BOEING 757 - CWA
MD DC9 - CWA
4000
BOEING 757 - OCA
MD DC9 - OCA
y = 357068x0.8165
3000
R2 = 0.81
2000
1000
0
400
800
1200
1600
2000
ISM (MN/m)
Figure 36. Relationship between ISM and horizontal tensile stress at
bottom of PCC Layer.
Figure 37. Load transfer efficiency across a joint.
30
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