Pre-defined system variables

Tekla Tedds
2020
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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
gacc = 9.80665 m/s²
ee = 2.7182818285
Water Kinematic viscosity at 10°C νwater@10 = 0.00000131 m²/s
Density at 4°C ρwater@4 = 1000 kg/m³
Concrete BS 8110 ΕS8110 = 200 kN/mm²
αC = 10x10-6°C-1
νC = 0.2
mc = 16
ρC.norm = 2400 kg/m³
ρC.norm_w = 2500 kg/m³
ρC.light = 1800 kg/m³
ρC.light_w = 1900 kg/m³
AC ρC.norm = 2400 kg/m³
ρC.light = 1800 kg/m³
BS5400 ρC5400 = 2500 kg/m³
αC5400 = 12x10-6°C-1
Εy_5400 = 200 kN/mm²
Steel General νS = 0.3
αS = 12x10-6°C-1
BS5950 ρS5950 = 7860 kg/m³
ΕS5950 = 205kN/mm²
GS5950 = 78.8 kN/mm²
KS5950 = 170.8 kN/mm²
EC3 ρSEC3 = 7850 kg/m³
ΕSEC3 = 210kN/mm²
GSEC3 = 80.8 kN/mm²
KSEC3 = 175 kN/mm²
BS5400 ρS5400 = 7860 kg/m³
ΕS5400 = 205kN/mm²
GS5400 = 80 kN/mm²
Steel AISC / LRFD ρSLRFD = 490 lb/ft³
ΕSLRFD = 29000 ksi
GSLRFD = 11200 ksi
AISC / ASD rSASD = 490 lb/ft³
ΕSASD = 29000 ksi
GSASD = 11200 ksi
ACI ΕACI = 29000 ksi

Aluminum

General ρAl = 2720 kg/m³
ΕAl = 70 kN/mm²
GAl = 26 kN/mm²
KAl = 69 kN/mm²
νAl = 0.33
αAl = 22x10-6°C-1
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