# Redundant truss - Condition (n > 2j - R)

Q.  If n > 2j – R, then the truss is called as _________.
(n = number of joints, j = number of members, R = number of reaction components)

- Published on 18 Sep 15

a. perfect truss
b. redundant truss
c. deficient truss
d. none of the above

#### Discussion

• savarnika   -Posted on 06 Jun 16
n+R>2j-it means truss contains more number of members than needed to be ridid it mean it is over rigid and statically indeterminate n+r<2j -it means trusscontains less number of members than needed to be rigid it means it is under rigid ,collapsible
• Sravanthi   -Posted on 16 Dec 15
- Trusses are of two different types: Perfect and imperfect truss.

- Imperfect truss is further classified as redundant truss and deficient truss.

- The condition for redundant truss is n > 2j – R

here (n = number of joints, j = number of members, R = number of reaction components)

- The condition for deficient truss is n < 2j – R
• Manik Anand   -Posted on 03 Dec 15
here n=no. of members and j is the no. of joints.

## ➨ Post your comment / Share knowledge Enter the code shown above:

(Note: If you cannot read the numbers in the above image, reload the page to generate a new one.)