Year-Letter Number System

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BC-1004 – Revised: June, 2006
Dr. Larry W. Olson - Extension Animal Scientist

BIF Frame Score Chart - Bulls

Age Mature Bulls - Frame Score & Hip Height (inches) Age
months 1 2 3 4 5 6 7 8 9 10 days
5 33.5 35.5 37.5 39.5 41.6 43.6 45.6
47.7 49.7 51.7 ----
6 34.8 36.8 38.8
40.8
42.9
44.9 46.9 48.9 51.0 53.0 ----
Wean 35.7 37.7 39.7 41.7 43.8
45.8 47.8 49.8 51.8 53.9 205
7 36.0 38.0 40.0
42.1
44.1 46.1 48.1 50.1 52.2 54.2 ----
8 37.2 39.2
41.2 43.2 45.2 47.2 49.3 51.3 53.3 55.3 ----
9 38.2 40.2
42.3
44.3 46.3
48.3 50.3 52.3 54.3 56.3 ----
10 39.2 41.2 43.3 45.3 47.3 49.3
51.3 53.3 55.3 57.3 ----
11 40.2 42.2 44.2 46.2 48.2 50.2 52.2 54.2 56.2 58.2 ----
12 41.0
43.0 45.0 47.0 49.0 51.0 53.0 55.0 57.0 59.0 365
13 41.8
43.8
45.8 47.8 49.8 51.8 53.8 55.8
57.7 59.7 ----
14 42.5
44.5
46.5 48.5 50.4 52.4 54.4 56.4 58.4 60.4 ----
15 43.1
45.1 47.1 49.1
51.1
53.0 55.0 57.0 59.0 61.0 452
16 43.6
45.6 47.6 49.6 51.6 53.6 55.6 57.5 59.5 61.5 ----
17 44.1
46.1 48.1 50.1 52.0 54.0
56.0 58.0 60.0 62.0 ----
18 44.5
46.5 48.5 50.5 52.4 54.4
56.4 58.4 60.3 62.3 550
19 44.9
46.8 48.8 50.8 52.7 54.7 56.7 58.7 60.6 62.6 ----
20 45.1
47.1 49.1 51.0
53.0
55.0 56.9
58.9 60.9 62.9 ----
21 45.3
47.3 49.2 51.2 53.2 55.1 57.1 59.1 61.0 63.0 ----
Frame Score = -11.548 + (0.4878 x HT) - (0.0289 x AGE) + (0.00001947 x AGE x AGE) + (0.0000344 x HT x AGE)
Age Mature Bulls - Frame Score & Hip Height (inches) Age
months 1 2 3 4 5 6 7 9 9 10 days
24 46.4 48.3 50.3 52.3 53.9 56.0 58.0 60.0 62.0 64.0 ----
30 47.3 49.3 51.3 53.2 54.9 57.0 59.0 61.0 63.0 65.0 ----
36 48.0 50.0 51.9 53.8 55.5 57.5 59.5 61.5 63.5 65.5 ----
48+ 48.5 50.4
52.3 54.1 55.9 58.0 60.0 62.0 63.9 65.8 ----

Beef Improvement Federation - Guidelines for Uniform Beef Improvement Program (1996)

For More Information:

Dr. Larry W. Olson
Extension Animal Scientist
Edisto Research & Education Center
64 Research Rd.
Blackville, SC 29817
Email: LOLSON@clemson.edu
Phone: 803-284-3343 ext 231
Fax: 803-284-3684