Technical Document of Rediwa C.A.T 3 Concealed System

Transcription

1 Technical Document of Rediwa C.A.T 3 Concealed System Technical Dep. Wandegar Wandegar_2001_S.L.U -_P.I_Mabesa_Camí_Foies_Ferraes_Nave_13._ Phone_ _363_721 Fax_ _386_720 CP:_12110 L'Alcora_(Castellón)_ INTRODUCTION The façade is the outdoor and main wall of a building, isolating the perimeter of outdoor environment. The main characteristic of ventilated façades is the air chamber, divided by two parts, the indoor one resolved by the insulation and sealing, and the outdoor one, which form an air chamber, ensuring a continuous ventilation along the whole façade surface. It permits isolate the cold in winter and warm in summer, achieving energetic saves up to 30%. Outdoor cladding walls could be of many kind of materials such ceramic, natural stone, composites, etc. Rediwa CAT 3 concealed system is a non-visible anchoring that supports and retains the ceramic by its corners. Furthermore, the system is complemented by the longitudinal fixing of an elastic adhesive which bonds the ceramic to the vertical profiles, increasing the safety and avoiding any vibration because of wind, expansion, etc. USING TERMS Rediwa CAT 3 Concealed System has been developed to be installed such ventilated cladding wall with ceramic tiles, point-fixed with stainless steel clamps and longitudinal beads of adhesive to the metallic structure. This system does not contribute to building stability. Wandegar or any other specialized company approved by us should install the system, being possible the technical assistance of Wandegar. We reserve the inspection right of checking any installation of the system described in this document, whether or not executed by Wandegar. The installer company will ensure that installation will be executed according to conditions exposed in this document and tolerating the observations made by the Technical Department of Wandegar.

2 TECHNICAL DOCUMENT OF VENTILATED FAÇADE SYSTEM This Technical Document has been created by the Technical Department of Wandegar following the specifications in the actual normative. The system metallic substructure and its anchorages on the wall (vertical profiles and brackets) are exactly the same than the ones described in DIT 529/09 that issue the Eduardo Torroja Sciences Construction Institute, so Wandegar extends this structure description to this document.

3 1. OBJECT Rediwa CAT 3 concealed system has been developed to install ventilated façade in new building or restoration, composed by ceramic tiles fixed to the aluminium framework with chemical and mechanical anchors. The framework is based in vertical profiles, fixations and its corresponding anchors. They were developed to being installed on regular and vertical walls. These walls can be done of concrete, bricks or metallic structure. Anyway, anchors should be defined in the ventilated façade technical project depending the support and loadings to transmit. 2. DESCRIPTION OF THE SYSTEM The Rediwa CAT 3 concealed system is composed by: - Vertical aluminium profiles anchored to wall support with brackets and the necessaries anchors. These profiles will be coincident with the vertical joints. - 4 Slots on each ceramic border tile - Stainless steel clips AISI Single component elastic putty, based on polymer MS. Fig. 1: Detail of Rediwa CAT 3 concealed system

4 3. COMPONENTS AND MATERIALS 3.1 Coverings This system has been developed to use it with ceramic coverings. Wandegar is not a ceramic producer, so we do not guarantee its quality. 3.2 Elastic adhesive putty. Single component elastic putty, based on a fast drying MS polymer in contact with air moisture. Properties: - Single component, easy application between +5 and +50 ºC - It adheres without primmer - Neutral. It doesn t corrode metals neither alkaline substrates attacks. - It stays flexible from -40 to +90ºC - Very high resistance to UV. - Good adherence on wet surfaces. Characteristics of non-dried adhesive Aspect Homogeneous creamy paste Take off (NF P 85501): Null Tack free (ASTM C ) minutes Dry speed to A23ºC and 55% air 2-3 mm/day moisture Volume losses (DIN 52451) Inappreciable Skin formation (BS 5889 Ap A) minutes Ignition temperature (DIN 51794) 460 ºC Application temperature +5 to +50ºC Characteristics of dried adhesive (4 weeks to 23ºC and 55% air moisture) Aspect Similar to rubber Shore Hardness A (DIN 53505) 40±3 Elastic Module 100% (DIN 53504) MPa Traction Resistance (DIN 53504) MPa Breaking Elongation (DIN 53504) % Joint Movement 25% Temperature Resistance -40 to +90ºC UV Resistance Very good

5 3.3 CLIPS The anchoring clips are made in stainless steel AISI 304. These clamps are fixed to vertical framework with auto drilling screws A2 4.5x19mm coincident with vertical opened joints, so installation and replacement is very easy. Fig. 2 CAT 3 concealed clip Mechanical Properties: Creep Resistance 310 MPa (45 KSI) Maximum Resistance 620 MPa (90KSI) Elongation 30% (in 50mm) Area Reduction 40% Modulus of Elasticity 200 Gpa (29000 KSI) Physic Properties: Density 7.8 g/cm3 (0.28 lb/in3) Chemical Properties: 0.08% C min 2.00 % Mn 1.00 % Si % Cr % Ni % P 0.03 % S

6 3.4 SUBSTRUCTURE Materials The vertical profiles and brackets are manufactured with extruded aluminium of magnesium-silicon alloy EN-AW 6063 with treatment T5. Phisical and mechanical characteristics are indicated on this table: Density (kg/dm3) 2.7 Modulus of Elasticity (MPa) Poisson Coefficient 0.33 Maximum tension admissible (MPa) (4) 175 Elastic Limit Rp 0.2 (MPa) (4) 130 Elongation 8 Thermal Expansion Coefficient (k-1) ( to 100ºC) Brackets Exist two types: - Sustaining brackets, which support and transmit to the concrete structure weight and wind burdens. They re usually fixed to slabs. - Retaining brackets, which they just transmit the horizontal wind burdens. They re fixed to wall support. All these brackets are 3mm thickness. You can check the geometric characteristics of the brackets in the following table: Characteristics Length sides 70x50 Length sides 90x60 Weight (kg/m) Area (mm2) Perimeter (mm) Turning radius Xc (mm) Turning radius Yc (mm) Moment of Inertia Ixx (cm4) Moment of Inertia Iyy (cm4)

7 Standard Bracket 140x50x115x3 Standard Corner Bracket 140x220x70x Vertical Profile There exist four different standard vertical profiles. Physical and mechanical characteristics are indicated on this table. Measurements are indicated on fig. 3. Dimensional and shape tolerances are agree with Norm UNE EN To special applications, these profiles could be another one non-standardized according to the needs. Tube profile 40x40 Column Vertical Profile 80x40 T Vertical Profile 60 x 80 Column Vertical Profile 80x64

8 3.5.4 Fasteners The fasteners to join profiles together and also to the brackets are manufactured with stainless steel on A2 or A4 alloy with the measurements and mechanical properties according to this table.

9 3.5.5 Anchorages to support Type, position and number of anchorages of the brackets to the wall support will depend according to the support material and the efforts transmitted to it, being reflected on the previous ventilated façade project. The standard anchorages to the slabs are the mechanical plugs A2 M8x75 with these main characteristics: - Traction Resistance: 561 kg - Shear loading: 513 kg 4. INSTALLATION 4.1 VERTICAL PROFILES INSTALLATION This structure is installed on the support with the brackets and necessary anchorages. The vertical profiles will be installed coincident with the vertical joints.

10 4.2 PORCELAIN INSTALLATION To install the porcelain, you have to fix to the vertical profile an initial clamp with the auto-drilling screw 4.2x19 on the bottom side of the porcelain. Then, you have to apply a vertical putty string on the vertical profile, and then, when you install the porcelain, this putty will also join the porcelain to the profile. This putty provides a higher safety and avoids porcelain movements. Then non-leaving the porcelain, insert the standard clamp on the top grooves and screw to the vertical profile. Then, you can continue fixing all the horizontal line with porcelain using the initial clamps and following the process. It s advisable to start from the bottom to the top. Apply the putty string Clip installed

11 5. TESTS IN EXTERNAL LABORATORIES 6. STRUCTURAL CALCULATION The action on the ventilated façade system will be calculated according to CTE DBSE-AE related to actions on edification. For the system calculation, it will be considered that porcelain should support wind loadings (pressure and suction) and transmit them, with its own weight and through the structure and anchorages to the support. To buildings up to 30m high and to limitations according to CTE-DB-SE- AE related to wind action, these will be determined according to established in that Basic Document (DB), that talks about the building high, size and position of the porcelain. For greater heights, or special wind loading areas, it will be necessary to make a specific study to determine the wind actions and Aeolian pressure/suction coefficients.