Year-Letter Number System

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BC-1005 – Revised: June, 2006
Dr. Larry W. Olson - Extension Animal Scientist

BIF Frame Score Chart - Bulls

Age Frame Score & Hip Height (inches) Age
months 1 2 3 4 5 6 7 8 9 10 days
5 33.1 35.1 37.2 39.3 41.3 43.4 45.5
 47.5 49.6 51.6 ----
6 34.1
36.2  38.2 40.3 42.3 44.4 46.5 48.5 50.6 52.6 ----
Wean 34.8
 36.9
 38.9
 41.0
 43.0
 45.1
 47.1 49.2 51.2 53.3
 205
7 35.1
 37.1
 39.2
 41.2
 43.3
 45.3
 47.4 49.4 51.5 53.5
 ----
8 36.0
 38.0
 40.1 42.1
 44.1 46.2 48.2 50.2 52.3 54.3
 ----
9 36.8
  38.9
 40.9
 42.9
 44.9
 47.0
 49.0
 51.0 53.0 55.0
 ----
10 37.6
 39.6
 41.6
 43.7 45.7 47.7
 49.7
 51.7 53.8 55.8
 ----
11 38.3
 40.3
 42.3
 44.3
 46.4
 48.4
 50.4
 52.4
 54.4
 56.4
 ----
12 39.0 41.0 43.0 45.0 47.0 49.0 51.0 53.0 55.0 57.0 365
13 39.6 41.6 43.6 45.5 47.5 49.5 51.5 53.5 55.5 57.5 ----
14 40.1 42.1 44.1 46.1 48.0 50.0 52.0 54.0 56.0 58.0 ----
15 40.6 42.6 44.5 46.5 48.5 50.5 52.4 54.4 56.4 58.4 452
16 41.0 43.0 44.9 46.9 48.9 50.8 52.8 54.8 56.7 58.7 ----
17 41.4 43.3 45.3
47.2
49.2 51.1 53.1 55.1 57.0 59.0 ----
18 41.7 43.6 45.6 47.5 49.5 51.4  53.4
55.3 57.3 59.3 550
19 41.9 43.9 45.8 47.7 49.7 51.6 53.6 55.5 57.4 59.4 ----
20 42.1 44.1 46.0
47.9
49.8 51.8 53.7 55.6  57.6 59.6 ----
21 42.3 44.2 46.1 48.0 50.0 51.9 53.8 55.7 57.7 59.7 ----
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 Cows - Frame Score & Hip Height (inches) Age
months 1 2 3 4 5 6 7 9 9 10 days
24 43.1 45.0
46.9 48.8
50.7 52.5 54.5 56.4 58.2 60.1 ----
30 43.8 45.8
47.5 49.4 51.3 53.1 55.1 57.0 58.9 60.8 ----
36 44.2 46.1
48.0
49.8 51.8 53.6
55.5 57.2 59.2 61.0 ----
48+ 44.6 46.5
48.2
 50.0 52.0 53.9 55.8 57.5
59.4 61.2 ----

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