Canada Parameters dialog
Used to enter material and design parameters if Canadian specifications are to be used for gravity or lateral member design.
Steel Material tab
| Setting | Description |
|---|---|
| table | The steel material type (based on Table 6-3 from CSA G40.21) for each type of structural member must be selected. This steel type is combined with the nominal yield strength assigned to each individual member to determine the steel grade and the design yield strength of the section. For example, a section of type W with a nominal Fy of 350 N/mm2 is assigned a steel grade of 350W. A nominal Fy of slightly less than 350 will result in a steel grade of 300W. Specifying a nominal Fy and material type that has no matching steel grade will result in a design yield strength of 0.0 and no grade assignment. A steel of unknown grade should be designated as a '?' (unknown) steel grade and the program will use the assigned nominal Fy value for the design Fy. |
| Built-Up | Flange sections can be designated as being built-up of universal milled plate (Mill Plate) or of flame-cut plate (Flame-Cut Edges. The type of plate has an impact on the axial capacity of the section in both RAM Steel Column and RAM Frame, as described in CAN/CSA-S16-01, S16-09, S16-14 Section 13.3.1. Sections of type WWF are considered to be made with flame-cut flange plates, in accordance with G40.20. |
| HSS | Hollow structural sections (round, square and rectangular) can be designated to be Class C (cold-formed non-stress-relieved) or Class H (hot or cold-formed stress-relieved). This designation applies to all HSS in the model. The class designation has an impact on the axial capacity of the HSS section in both RAM Steel Column and RAM Frame, as described in CAN/CSA-S16-01, S16-09, S16-14 Section 13.3.1. |
Deflection tab
| Setting | Description |
|---|---|
| % of Live Load to consider as Long Term | In the determination of the deflection of Composite beams, CAN/CSA-S16 requires that the effects of creep and shrinkage be considered. For creep, the post-composite Dead and long-term Live Loads are multiplied by 1.15. You specify the portion of the total Live Load to be considered long-term. |
| nt for Shrinkage Deflection (S16-01) | For shrinkage, the modular ratio, nt, must be specified. The modular ratio nt equals E/Ect where Ect is the effective modulus of concrete in tension. The value normally ranges from 40 to 60 with a value of 60 recommended in Appendix H5. The modular ratio, ns, for S16-09 is calculated by the program. |
| % of Shrinkage Deflection to include with Live Load Deflection | A percentage of the resulting shrinkage deflection will be added to the Live Load, as specified; the remainder will be added to the Dead Load. |
These parameters only affect composite beam design in RAM Steel Beam Design.