What are the design parameters which control deflection check?
1. DFF : This is the value which indicates the allowable limit for L/d ratio. For example, if a user wishes to instruct the program that L/d cannot be smaller than 900, the DFF value should be specified as 900. The default value for DFF is 0. In other words, if this parameter is not specified as an input, a deflection check will not be performed. 2. DJ1 and DJ2 : These 2 quantities affect the “L” as well as the “d” in the calculated L/d ratio. They represent node numbers that form the basis for determining L and d. By default, DJ1 and DJ2 are the start and end nodes of the member for which the design is being performed, and “L” is the length of the member, namely, the distance between DJ1 and DJ2. However, if that member is a component segment of a larger beam, and the user wishes to instruct STAAD that the end nodes of the larger beam are to be used in the evaluation of L/d, then he/she may input DJ1 and DJ2 as the end nodes of the larger beam. Also, the “d” in L/d is calculated as th
1) DFF : This is the value which indicates the allowable limit for L/d ratio. For example, if a user wishes to instruct the program that L/d cannot be smaller than 900, the DFF value should be specified as 900. The default value for DFF is 0. In other words, if this parameter is not specified as an input, a deflection check will not be performed. 2) DJ1 and DJ2 : These 2 quantities affect the “L” as well as the “d” in the calculated L/d ratio. They represent node numbers that form the basis for determining L and d. By default, DJ1 and DJ2 are the start and end nodes of the member for which the design is being performed, and “L” is the length of the member, namely, the distance between DJ1 and DJ2. However, if that member is a component segment of a larger beam, and the user wishes to instruct STAAD that the end nodes of the larger beam are to be used in the evaluation of L/d, then he/she may input DJ1 and DJ2 as the end nodes of the larger beam. Also, the “d” in L/d is calculated as th
