Load-Bearing Sheet T70-57L-1058

Optimal geometry of the T70 enables cost efficient roof structures for reasonable spans.

For the optimal structural dimensioning, use Ruukki’s roof dimensionin software, Poimu.

T70 is targeted for roof structures with spans less than 5m.

All of Ruukki’s load-bearing sheets can be equipped with smart technology. The new Ruukki® Roof Sensor system tracks snow loads on roofs in real time, prevents dangerous situations and saves costs by making snow removal smarter. Read more about the benefits of smart roofs here.

The information on our website is accurate to the best of our knowledge and understanding. Although every effort has been made to ensure accuracy, the company cannot accept any responsibility for any direct or indirect damages resulting from possible errors or incorrect application of the information of this publication. We reserve the right to make changes.

Copyright © 2019 Ruukki Construction. All Rights Reserved.

    Properties
    T70-65L-1058-cross-section.ashx
    Model name
    Load-Bearing Sheet T70-57L-1058
    Product code
    T70-57L-1058
    Height
    70 mm
    Width of valley
    57 mm
    Width of crown
    65 mm
    Effective width
    1057.5 mm
    Minimum length
    600 mm
    Maximum Length
    15000 mm
    Typical Span
    <5 m
    Quality control
    Factory production control according to EN 1090-1 and EN 1090-4
    Tolerances
    Dimensions and shape according to EN 1090-4, material thickness according to EN 10143
    CE Marking
    EN1090-1
    Execution class
    EXC1, EXC2, EXC3
    Materials
    Material thickness (mm) Steel grade Zinc (g/m2) Surface treatment Corrosion class, interior Corrosion class, exterior Colours  Weight (kg/m2)
    0.7 S350 Z275 Galvanized C2 - 7.79
    0.7 S350 Z100 Polyester 15 C2 - RR20  7.79
    0.7 S350 Z275 Polyester 25 C3 C3  RR20 7.79
    0.8 S350 Z275 Galvanized C2 - 8.90
    0.8 S350 Z100 Polyester 15 C2 - RR20  8.90
    0.8  S350  Z275  Polyester 25  C3  C3  RR33  8.90 
    0.9 S350 Z275 Galvanized C2 - 10.02
    0.9 S350 Z100 Polyester 15 C2 - RR20 10.02
    1.0  S350  Z275  Galvanized  C2  - 11.13 
    1.0  S350  Z100  Polyester 15  C2  - RR20  11.13 
    1.0  S350  Z275   Polyester 25  C3  C3 RR20, RR33  11.13 
    1.0  S350  Z275   GreenCoat Pural  C4  RR23  11.13 

     

    Note: The reverse sides of the colour coated sheets are painted as standard with 2-layer grey backside coating

     

    Protection against corrosion

    Environment Coating
    Interior applications in environments with corrosivity category C1, C2 according to EN ISO 12944-2 standard and A1, A2 according to EN 10169 standard Steel sheets with zinc coating of 100 g/m2 and with polyester coating SP 15, thickness 15 μm
    Interior applications in environments with corrosivity category C1, C2, C3 according to EN ISO 12944-2 standard and A1, A2, A3 according to EN 10169 standard Steel sheets with zinc coating of 275 g/m2 and with polyester coating SP 25, thickness 25 μm

    Perforation

    Perforation

    Standard degree of perforation (within the area perforated) is 15%. Perforations are 3 mm in diameter and their arrangement is based on an equilateral triangle with a side of 7.4 mm.
    Load-bearing-sheet-perforation
    Perforation pattern Rv 3.0 - 7.4; degree of perforation = 15% within the area perforated.

    Corrosion resistance

    Perforated trapezoidal profiles ought to be applied in accordance with technical specifications draw up to comply with obligatory standards, building regulations and assembly instructions.

    Due to requirement regarding corrosion resistance perforated steel sheets may be applied only indoors and as follows:
    Galvanized steel sheets with zinc coating 100 g/m fand organic coating SP 15 (polyester 15 µm) or Galvanized steel sheets with zinc coating 275 g/m fand organic coating SP 25 (polyester 25 µm) - in corroding medium C1 and C2 as per EN ISO 12944.

    Load bearing profile application

    Load bearing profiles are usually applied in multi layer roofing constructions. Web perforation leads to decreased strength parameters in the case of load bearing trapezoidal sheets. Use of Poimu software is recommended when determining the load capacity of perforated profiles: this software enables trapezoidal sheets within a structure to be dimensioned and optimized. For more information on Poimu visit software center and download Poimu.

    Sound absorption is similar to all profiles. However, small differences in sound insulation may occur dependent on profile height.

    Low profile application

    Acoustic profiled sheets have their whole surface perforated uniformly and are applied as interior facings of multi layer wall constructions and ceilings. They are characterized by a high sound insulation coefficient (150 - 4000 Hz). Application of perforated trapezoidal profiles results in improved acoustic conditions in such buildings as canteens and sports or production halls. Regulation of reverberation time is also possible through application of an appropriate quantity of perforated sheets in ration to non-perforated sheets.

    Acoustic absorption coefficient, absorption class

    Acoustic absorption coefficient αs was determined on the basis of ISO 354:2003. Absorption class was determined on the basis of EN 11654:1997.
    Tables 1 - 3 present acoustic absorption coefficients and absorption class for the relevant trapezoidal profiles and a construction corresponding to them. Specimens are names according to trapezoidal profile.

    Table 1. Absorption coefficient and class for construction

    Absorption coefficient at octave bands
     
    Specimen 63 Hz 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz Absorption class

    T20
    - vapour barrier
    - rock wool 100mm -100kg/m3

    0.22 0.70 0.89 0.85 0.79 0.45 0.18 D
    T45
    - vapour barrier
    - rock wool 100mm -100kg/m3
    0.25 0.73 0.93 0.89 0.84 0.48 0.18 D
    T130
    - vapour barrier
    - rock wool 100mm -100kg/m3
    0.29 0.85 0.98 0.86 0.35 0.21 0.09 E
    T153
    - vapour barrier
    - rock wool 100mm -100kg/m3
    0.28 0.83 0.97 0.85 0.41 0.22 0.08 E

    Table 2. Absorption coefficient and class for construction

    Absorption coefficient at octave bands
     
    Specimen 63 Hz 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz Absorption class

    T20
    - rock wool 100mm -100kg/m3

    0.18 0.74 0.94 0.92 0.93 0.94 0.82 A
    T20
    - sound absorbing mat 120g/m3
    - vapour barrier
    - rock wool 100mm -100kg/m3
    0.20  0.63  0.82  0.84  0.88  0.70  0.46 
    T153
    - rock wool 100mm -100kg/m3 
    0.23  0.63 0.82  0.84  0.88  0.70  0.46  C
    T153
    - sound absorbing mat 120g/m3
    - vapour barrier
    - rock wool 100mm -100kg/m3
    0.24 0.80 0.97 0.86 0.49 0.30 0.20 D
    T153
    - sound absorbing mat 120g/m3
    - sound absorbing mat 120g/m3
    - vapour barrier
    - EPS 60S Roof 100mm 
    0.05  0.20  0.54  0.79  0.44  0.31  0.24 

    Table 3. Absorption coefficient and class for construction

    Absorption coefficient at octave bands
     
    Specimen 63 Hz 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz Absorption class
    T153
    - rock wool 50mm-150kg/m3
    - vapour barrier
    - rock wool 50mm -110kg/m3
    0.20 0.69 0.79 0.77 0.45 0.29 0.26 D

    Material characteristics for specimen layers

    • Ruukki trapezoidal profile
    • Vapour barrier (0.25mm, 170g/m2)
    • Mineral wool - description given for every specimen in the tables
    • EPS 60S Roof (15kg/m3)
    Roof Sensor

    Introduction to Ruukki Roof Sensor system

    The purpose and aim of the Ruukki® Roof Sensor System is to measure and visualize the snow load on roofs constructed with Ruukki load bearing sheets. The system provides valuable information for safety and management decisions concerning the building. It’s accessory for all Ruukki load bearing sheets and is available for new and old roofs that have access to the lower surface of the sheeting. The system is easy to install and use and there is no need for further monthly service fees. 

    Following corner stones are needed in the system 
    1. In structural design, Ruukki’s POIMU roof dimensioning program must be used
    2. Ruukki Roof Sensors location must be defined by the structural designer and sensors appropriately fitted by the installer
    3. The parameters needed in system configuration are defined in POIMU program
    After the sensors installation and system configuration, the system gives warnings when designers defined characteristic snow load level have been reached. Further warnings will be given well before load bearing sheeting is approaching its ultimate capacity. Warnings are given by visual light on the roof level and through user interface in web pages in a local network.
     
     

    Documentation

    Accessories
    Accessories for load bearing sheets include e.g. flashings, fasteners, gaskets and sealing flanges. These accessories ensure fast assembly, fastening reliability, joint tightness.
    Design tools
    To make both architectural and structural design work easier, with accurate product information in 3D form, we offers a selection of CAD / BIM -objects and software tools, to be downloaded from the Software Toolbox portal.

     
    Ready modelled BIM objects

    Download objects for ArchiCAD
    Download objects for Revit

     
    Dimensioning software Poimu

    We offer excellent dimensioning software, Poimu, which allows you to optimise product choice according to the Eurocode.
    Simply by defining some basic input data you can select a load-bearing sheet for their needs from Ruukki's selection. This quick optimisation tool covers 1-, 2-span and continuous structures and gives the exact solution as to what sheet should be used, as well as its length. 

    Download Poimu

    Detail drawing (.dwg)

    Detail drawing (.pdf)

    Instructions

    ASSEMBLY INSTRUCTIONS

    Assembly instructions document includes information about:

    • Packing
    • Transportation and unloading
    • Storing
    • Assembling.
    Certificates & approvals

    Declaration of performance