F. SURFACE DIMENSIONING

CHAPTER F 'SURFACE DIMENSIONING' 6 With the options " Maximum Distance ", " Minimum Distance " and " Maximum Diameter " we set the respective minimum and maximum distances between the irons and the maximum diameter to be used. The minimum diameter is that specified in the minimum reinforcement. Attention is needed here especially in the definition of the minimum distance because, if the requirement is large, the program in the automatic calculation will not calculate any reinforcement if the required distance is less than the minimum! Then we define the combination, load or envelope according to the calculation of the required reinforcement will be made. In the "Tolerance" option we have the possibility to set a tolerance margin of the value of the calculated minimum reinforcement so that, when the calculation of the required reinforcement of each area is made, a single minimum reinforcement is calculated in the range of values defined by the tolerance and the initial minimum reinforcement. That is, the value of the tolerance is added to the As of the minimum reinforcement and those values of required reinforcement that are within this range are taken into account as a requirement, not with their actual value, but with the value corresponding to the As of the minimum required reinforcement. EXAMPLE: For example, if we have placed a minimum reinforcement F12/15 corresponding to 7.53 cm2/m and we have set a tolerance of 0 cm2/m, then all quadrilateral elements with a reinforcement requirement less than or equal to 7.53 cm2/m will be shown in the corresponding colour gradient to be sufficient. If we now, for the same case, set a tolerance of 2 cm2/m then, to the previous four-sided elements that seemed to be sufficient (for an As requirement of less than or equal to 7.53 cm2/m) will be added those elements that have a reinforcement requirement value up to 7.53 cm2/m + 2 cm2/m = 9.53 cm2/m. In fact, these elements will not be shown in the corresponding colour graduation of the required reinforcement not with their actual value but with the minimum reinforcement value of 7.53 cm2/m.