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Objectives of the Seminar

• Introduce RP & ASD

• Outline the Benefits of Steel

• Experience Completed Projects

• Explore possibilities

• Workshop for Façade design

• Forum for new partnerships and ideas

• Learn and Enjoy

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200

Modulus of ElasticityAn elastic modulus, or modulus of elasticity, is the mathematical description of an object or substance's tendency to be deformed elastically (i.e., non-permanently) when a force is applied to it. The elastic modulus of an object is defined as the slope of its stress-strain curve in the elastic deformation region:

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Wind Load relative deflectionThe modulus of elasticity of steel is three times higher compared to aluminium

For identical profile cross sections the deflection of Aluminium is more

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The modulus of elasticity of steel is three times higher compared to aluminium

For identical loads and identical deflection smaller steel profiles can be used.

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advantages RP-steel facadeThe modulus of elasticity of steel is three times higher compared to aluminium

Larger spans can be achieved with steel profiles by using the same cross sections.

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Minimize framework

Larger span width with steel

Typical visual characteristic of facade systems in

Aluminium STEEL

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Steel

Reduced box sizes

Result

Lower building depthare possible with steel compared to aluminium

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Large Spans

Result

Larger span widthsare possible with steel compared to aluminium

Facade of 14m width and 48m heightwithout expansion profiles

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Visableenvironment

profile depth 160 mm

Visible Sightlines

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Visable environment!Stahl

Video

Increased Light Transmission

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advantages RP-steel facade

1. Modulus of elasticity

1. Due to the modulus of elasticity of steel being three times higher than that of aluminium its static capacity is considerably higher.

2. For identical profile cross sections the deflection of steel is three times lower than the deflection of aluminium.

3. For identical load and identical deflection smaller steel profiles can be used.

4. Larger spans can be achieved with steel profiles by using the same cross sections.

steelaluminium

210.000 N/mm 70.000 N/mm

22

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Panelized Glazed

Elements

Reduced Program times

13m x 5m

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glass

concrete

steel

aluminium

timber

+10°C+20°C+30°C+40°C+50°C

Modulus of extension

!9,0

10,0

12,0

24,0

42,0

x 10 x 1/K-6

Steel has a lowerthermal extension than aluminium!

Steel, glass, concrete have almost the same coefficient of extension,therefore no extension profiles are required when using steel.

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167m withoutExpansion profiles

Advantages RP-steel facade

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advantages RP-steel facade

2. Modulus of extensionThe coefficient of extension of steel is half as big as that of aluminium.

Therefore, no additional measures are required to create space for material extension within the system.

Steel, glass and concrete in combination have roughly the same extension.

Due to the modulus of extension of aluminium being twice as high than that of steel, aluminium systems have to be thoroughly equipped with dilatation profiles.

Advantage steel:

- no cracking noise caused by extension- continuous water guiding level – therefore prevention of damages- easier to assemble- less material required- no negative effect on optic appearance as expansion joints are not necessary.

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Modulus of conductivity λ (W / m x K)

Steel ~ 50

Aluminium ~ 200

Uf = 1,8–2,1 W/m²K

Uf = 1,4 W/m²K

Steel

Aluminium

Reduced Thermal Transmissions

- Lower transportspeed of coldness- Rare condensation

- high transportspeed of coldness- condensation

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RP-steel facadeAluminium facade

Snow Center Dubai Snow Center Dubai

Reduced Risk of Condensation

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advantages RP-steel facade

3. Modulus of conductivity

The modulus of conductivity of steel is four times less than that of aluminium.

For this reason, the thermal insulation of the profiles of a steel facade is much better than that of an aluminium facade.

Modulus of conductivity

RP steel facade systems = 1,4 W/m²KStandard aluminium facade = 1,8 – 2,1 W/m²K

Advantage steel:

- energy saving- no condensation- lower heat radiation

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advantages RP-steel facade

6. Fire resistance

Fire resistance of steel is considerably higher than that of aluminium.

melting point steel = 1.500°Cmelting point aluminium = 660°C

7. Ecology

Substantially lower energy consumption during production of steel as compared to that of aluminium.

No toxic product waste with steel production.