Just to be sure I'm interpreting this correctly, each string of trichord Note 88 exerts a downbearing of 4.423 lbs (1/3 of 13.27 lbs), roughly 3.6 times more pressure than the single string of Note 1, right? And pressure is not evenly distributed across the bridge and soundboard but much more heavily loaded at the treble.
Laurence Libin
----- Original Message -----
From: David Love
To: caut at ptg.org
Sent: Friday, December 10, 2010 9:47 AM
Subject: Re: [CAUT] strange rib damage
Here's a typical Steinway B scale and resulting lbs. This totals out to 694 lbs. The lbs on each note takes into consideration the number of unisons. Using an average setting of 1 degree for every string would produce a total of 698 lbs. HTML probably helps to keep the chart organized.
Note# / bearing deg/ lbs
1
0.25
1.22
2
0.25
1.21
3
0.25
1.19
4
0.25
1.19
5
0.25
1.16
6
0.25
1.15
7
0.25
1.11
8
0.25
1.11
9
0.25
1.78
10
0.25
1.74
11
0.5
3.43
12
0.5
3.41
13
0.5
3.36
14
0.5
3.31
15
0.5
3.24
16
0.5
3.20
17
0.5
3.19
18
0.5
3.13
19
0.5
3.04
20
0.5
2.99
21
0.75
4.99
22
0.75
5.29
23
0.75
5.41
24
0.75
5.74
25
0.75
5.85
26
0.75
6.28
27
0.75
6.32
28
0.75
6.37
29
0.75
6.62
30
0.75
6.49
31
0.75
6.65
32
0.75
6.44
33
0.75
6.53
34
0.75
6.56
35
0.75
6.54
36
0.75
6.55
37
0.75
6.52
38
0.75
6.55
39
1
8.84
40
1
8.35
41
1
8.43
42
1
8.54
43
1
8.57
44
1
8.55
45
1
8.67
46
1
8.60
47
1
8.65
48
1
8.33
49
1
8.45
50
1
8.47
51
1
8.73
52
1
8.45
53
1
8.31
54
1
8.49
55
1
8.63
56
1
8.72
57
1
8.77
58
1
8.90
59
1
8.72
60
1
8.84
61
1
8.84
62
1
8.77
63
1
8.81
64
1
8.89
65
1.5
13.23
66
1.5
13.06
67
1.5
13.12
68
1.5
13.26
69
1.5
12.79
70
1.5
12.94
71
1.5
13.09
72
1.5
13.24
73
1.5
13.40
74
1.5
13.55
75
1.5
12.92
76
1.5
13.07
77
1.5
13.22
78
1.5
13.38
79
1.5
12.73
80
1.5
12.88
81
1.5
13.03
82
1.5
13.18
83
1.5
12.51
84
1.5
12.66
85
1.5
12.81
86
1.5
12.96
87
1.5
13.11
88
1.5
13.27
David Love
www.davidlovepianos.com
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