A simple wind speed survival calculation without any additional environmental or safety factors. A Survival calculation utilizes the maximum 3 second wind gust recorded over the past 30-40 yr period. Survival literally means that the tower will support the stated wind speed, antenna and ice loads with no permanent deformation or failure of tower components. Exceeding the stated wind speed, antenna and ice loads could result in a physical tower failure and the tower could fall over. A survival design can be used in either the US or Canada provided that zoning requirements do not dictate some other code or standard.
This tower design standard is utilized in the USA where dictated by zoning or building requirements. This national design code is more stringent than a "survival" design because it builds additional structural, environmental and safety factors into the calculation. If TowerCalc fails an TIA/EIA 222 Rev. F analysis for a particular tower model, that does not necessarily mean that the tower will fall over. It does mean however, that the model in question with the specific antenna load does not conform to the TIA/EIA 222 Rev. F standard and all the environmental and safety factors implied therein.
For CANADA where dictated by zoning or building requirements. This national design code is more stringent than a survival design because it builds additional structural, environmental and safety factors into the calculation. If TowerCalc fails a CSA analysis for a particular tower model, that does not necessarily mean that the tower will fall over. It does mean however, that the model in question with the specific antenna load does not conform to the CSA S37-01 standard and all the environmental and safety factors implied therein.
For Europe where dictated by the tower specification
For the USA where dictated by the tower specification or zoning regulations.