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Pre-defined system variables

Added March 16, 2018 by Tekla User Assistance tekla.documentation@trimble.com

Software version: 
Tekla Tedds 2018

Pre-defined system variables

Pre-defined system variables

Tedds contains a number of pre-defined variables, which you can use in all your calculations. The following table presents all pre-defined system variables in Tedds.

Predefined system variables
Base system variables General π = 3.1415926536
pi = 3.1415926536
g acc = 9.80665 m/s²
e e = 2.7182818285
Water Kinematic viscosity at 10°C ν water@10 = 0.00000131 m²/s
Density at 4°C ρ water@4 = 1000 kg/m³
Concrete BS 8110 Ε S8110 = 200 kN/mm²
α C = 10x10 -6 °C -1
ν C = 0.2
m c = 16
ρ C.norm = 2400 kg/m³
ρ C.norm_w = 2500 kg/m³
ρ C.light = 1800 kg/m³
ρ C.light_w = 1900 kg/m³
AC ρ C.norm = 2400 kg/m³
ρ C.light = 1800 kg/m³
BS5400 ρ C5400 = 2500 kg/m³
α C5400 = 12x10 -6 °C -1
Ε y_5400 = 200 kN/mm²
Steel General ν S = 0.3
α S = 12x10 -6 °C -1
BS5950 ρ S5950 = 7860 kg/m³
Ε S5950 = 205kN/mm²
G S5950 = 78.8 kN/mm²
K S5950 = 170.8 kN/mm²
EC3 ρ SEC3 = 7850 kg/m³
Ε SEC3 = 210kN/mm²
G SEC3 = 80.8 kN/mm²
K SEC3 = 175 kN/mm²
BS5400 ρ S5400 = 7860 kg/m³
Ε S5400 = 205kN/mm²
G S5400 = 80 kN/mm²
Steel AISC / LRFD ρ SLRFD = 490 lb/ft³
Ε SLRFD = 29000 ksi
G SLRFD = 11200 ksi
AISC / ASD r SASD = 490 lb/ft³
Ε SASD = 29000 ksi
G SASD = 11200 ksi
ACI Ε ACI = 29000 ksi

Aluminum

General ρ Al = 2720 kg/m³
Ε Al = 70 kN/mm²
G Al = 26 kN/mm²
K Al = 69 kN/mm²
ν Al = 0.33
α Al = 22x10 -6 °C -1
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