Agrément Certificate 2011/393

Transcription

1 Agrément Certificate 2011/393 Copyright Agrément South Africa, August 2011 Subject: Geberit Pluvia Syphonic Roof Drainage System The master copy of this document appears on the website: Validity Users of any Agrément certificate should check its status: all currently valid certificates are listed on the website. In addition, check whether the certificate is Active or Inactive. The certificate holder is in possession of a confirmation certificate attesting to his/her status. Certificate holder: Geberit Southern Africa (Pty) Ltd PO Box 276, WENDYWOOD, 2144 Telephone: Fax: E mail: mark.schurr@geberit.com Quick guide Contents page 2 Preamble page 3 Conditions of certification page 4 Assessment page 6 Compliance with the National Building Regulations page 7 Technical description page 10 P O Box 395 Pretoria 0001 Telephone Fax http agrement@csir.co.za Description and use The Geberit Pluvia Syphonic Roof Drainage System comprises: stainless steel, upvc coated steel or HDPE roof rainwater outlets with 56 mm or 90 mm diameter spigots HDPE pipes and fittings as certificated in Agrément certificate 2011/392: Geberit HDPE Above Ground Soil and Waste Drainage System computer software to determine drainage system requirements for each installation. The certificate covers the use of the system for the drainage of rainwater from roofs of mainly commercial, industrial and public buildings. This certificate and Agrément South Africa s assessment apply only to the Geberit Pluvia Syphonic Roof Drainage Systems when components are manufactured by Geberit Ltd; systems are designed using Geberit Pluvia software and installed by persons trained and approved Geberit Southern Africa (Pty) Ltd and the terms and conditions of certification are complied with. Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 1 of 25

2 CONTENTS PREAMBLE PART 1: CONDITIONS OF CERTIFICATION PART 2: ASSESSMENT Scope of assessment Assessment Table 1: Compliance with National Building Regulations Table 2: Performance Table 3: Quality management system PART 3: TECHNICAL DESCRIPTION General description Design of drainage systems Delivery and site handling Installation Maintenance ertificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system 2 of 25

3 PREAMBLE This certificate is issued by Agrément South Africa in terms of the powers granted to it by the Minister of Public Works. This certificate: has been granted after a technical appraisal of the performance of the Geberit Pluvia Syphonic Roof Drainage System for the uses covered by the certificate is independent of any patent rights that may or may not subsist in the subject of the certificate does not relieve the certificate holder from the obligation to obtain the prior approval of the building authority concerned for the use of the subject. Agrément South Africa considers that the quality and performance of the Geberit Pluvia Syphonic Roof Drainage System will be satisfactory, provided that the requirements stipulated in this certificate are adhered to. However, Agrément South Africa does not on behalf of itself, or the State, or any of its employees or agents, guarantee such quality or performance. Responsibility for compliance with the requirements of this certificate and the quality of the finished product resides with the certificate holder. No action for damages, or any other claim whatsoever, lies against Agrément South Africa, its members, the State or any of its employees, should the said components and materials fail to comply with the standard set out in this certificate. Interested parties or users who are in any doubt about any detail or variation should contact Agrément South Africa. The validity of this certificate is reviewed every three years. The certificate shall remain valid as long as Agrément South Africa is satisfied that: the certificate holder complies with the general and specific conditions of certification and the technical requirements stipulated in the certificate the performance-in-use of the subject is acceptable any changes in building legislation, regulations, relevant standards or Agrément performance criteria have not invalidated the technical assessment that formed the basis of certification. Agrément South Africa reserves the right to withdraw the certificate at any time, should reasonable cause exist. Notices affecting the validity of this certificate will be published in the Government Gazette. Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 3 of 25

4 PART 1: CONDITIONS OF CERTIFICATION Components of the Geberit Pluvia Syphonic Roof Drainage System as described in this certificate must be: manufactured by the certificate holder or its parent company designed by persons trained and approved by Geberit Southern Africa (Pty) Ltd using Geberit Pluvia software installed or used in accordance with o the technical description set out in Part 3 o o o the certificate holder s installation manual or specifications good building practice the Conditions of Certification. Any change to material formulations, the production process, or the installation techniques as set out in the certificate holder s specifications could result in various aspects of the performance of this product no longer complying with Agrément South Africa s performance criteria. Any change not authorised by Agrément South Africa in writing prior to its implementation will invalidate this certificate and the certificate can then not be used to demonstrate compliance with the National Building Regulations. General conditions Geberit Pluvia Syphonic Roof Drainage System Tested and approved fit for purpose when constructed as specified in CERTIFICATE 2011/393 Marking Where possible, components of the system or packaging must be suitably marked with: Agrément South Africa s identification logo together with the number of this certificate the works order number, batch number, date, as applicable, and storage recommendations. Validity The continued validity of this certificate is subject to a satisfactory review by Agrément South Africa every three years. Quality monitoring The certificate holder is required to participate in Agrément South Africa s post-certification quality management system, which requires: that the certificate holder shall continue to implement and manage the quality system approved by Agrément South Africa in the assessment of the Geberit Pluvia Syphonic Roof Drainage System the cooperation of the certificate holder in facilitating postcertification quality monitoring by Agrément South Africa or its authorised agents. Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 4 of 25

5 Reappraisal must be requested by the certificate holder prior to making changes to the system will be required by Agrément South Africa if there are changes to the National Building Regulations or Agrément South Africa. This certificate may be withdrawn if the certificate holder or a registered licensee fails to comply with these requirements. On behalf of the Board of Agrément South Africa Chairperson August 2011 Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 5 of 25

6 PART 2: ASSESSMENT The conventional aspects of the construction are subject to the rules of good building practice (typically as described and illustrated in Agrément South Africa s Supplement to certificates and in the Home building manual Parts 1, 2 & 3 issued by the National Home Builders Registration Council), and must comply with the National Building Regulations. Republic of South Africa. National Building Regulations, Government Notice R. 2378, Government Gazette No 12780, Pretoria, South Africa, 12 October 1990 Scope of assessment This assessment applies to those innovative aspects of the Geberit Pluvia Syphonic Roof Drainage System as described in Part 3 of the certificate. It also applies to those conventional aspects of the product which, in the opinion of Agrément South Africa, are influenced by the innovative aspects. The innovative aspects referred to are the use of: Geberit s proprietary software for the design of Geberit Pluvia Syphonic Roof Drainage System installations Geberit Pluvia stainless steel, upvc coated steel or HDPE roof rainwater outlets, in conjunction with HDPE pipes and fittings, to drain rainwater from roofs. Assessment In the opinion of Agrément South Africa, the Geberit Pluvia Roof Drainage System as described in the certificate is suitable for the use specified (see page 1). The performance-in-use of the Geberit Pluvia Syphonic Roof Drainage System will be such that it will satisfy: the requirements of the National Building Regulations stated in Table 1. Any regulation not specifically referred to is considered to be outside the scope of this certificate and must be applied by the local authority in the normal manner Agrément South Africa s performance criteria. Agrément South Africa s detailed comments on the assessment are set out in Tables 1, 2 and 3 below. Each aspect of performance was assessed by experts in that field. Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 6 of 25

7 Table 1: Compliance with the National Building Regulations Aspects of performance Fitness-for-purpose of materials used Opinion of Agrément South Africa The quality and suitability of the materials making up the system are satisfactory National Building Regulations satisfied The materials used in the Geberit Pluvia Syphonic Roof Drainage System are deemed to satisfy the requirements of Regulation A13(1)(a) Materials Drainage Satisfactory, provided that the requirements of this certificate are complied with Regulation P2 (1) Design of drainage installations is deemed to be complied with when installations are designed by approved competent persons using Geberit s software Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 7 of 25

8 Table 2: Performance Aspects of performance Drainage layout and calculation Opinion of Agrément South Africa Satisfactory, subject to the provisions listed below. SANS /EN : Gravity drainage systems inside buildings Roof drainage, layout and calculation Explanatory notes With respect to layout and calculation, the Geberit Pluvia Syphonic Roof Drainage System will meet the requirements of SANS / EN when: designed in accordance with Geberit s guidelines and utilising Geberit s Pluvia software complying with the provisions listed in this certificate. Hydraulic performance - flow capacity Satisfactory Systems are designed to operate using syphonic principles. Pipes downstream of outlets are designed to be primed when rainfall intensities are equal to or exceed design rainfall intensities. At lesser rainfall intensities systems will operate as conventional gravity systems. Provision is made when designing the system for rainfall intensities greater than design assumptions by allowing for emergency outlets or suitably placed overflows. Hydraulic performance - maximum negative pressure Satisfactory, subject to the maximum negative pressures being determined using a rainfall intensity for which all pipes flow full and the appropriate roughness for new pipes are assumed An acceptable allowance has been provided for in the software for pipe roughness which allows for the effects of pipe joints, ageing and the possible deposition of fine sediment in the system Maximum negative pressure at the critical points in pipework will occur when the system is carrying maximum syphonic flow and when pipes are new Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 8 of 25

9 Table 2: Performance (continued) Adequacy of securing Pluvia outlets and pipes Strength of components and durability Satisfactory Satisfactory, subject to adherence to the design criteria for maximum allowable negative pressure of both Geberit as well as the criteria according to Clause 6.3 of BS Agrément certificate 2011/392: Geberit HDPE Above Ground Soil and Waste Drainage System. The recommendations made by Geberit with respect to the fitting of Pluvia outlets and the support of pipe-work must be adhered to Outlets and pipe-work are assessed as being of adequate strength and durability. Pipes above ground are unconstrained with respect to buckling due to external air pressure acting in conjunction with an internal vacuum or negative pressure. In trafficked areas, outlets are to be fitted with appropriately sized load-bearing gratings. Pipes, access pipes, bends, branch fittings, reducers, expansion sockets and flanged bushings meet the requirements of Agrément certificate 2011/392 BS : Guide to Syphonic roof drainage systems. Adequacy and provision of joints Ease of installation Satisfactory Satisfactory Pipe-work joints will remain air and watertight under normal operating conditions. It is recommended that joints be made under controlled conditions in accordance with Geberit s recommendations and by persons trained in making joints, especially butt welds and electro-fusion joints. At and around Geberit Pluvia outlets, joints between contact foils or sheets and polymer or bitumen-based roof membranes, respectively, must be made with care and with due regard to good building practice as per the membrane manufacturer s recommendations Installation of the systems will be achieved easily provided procedures prescribed in Geberit Pluvia Application Technique are strictly adhered to Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 9 of 25

10 Table 2: Performance (continued) Ease of maintenance Satisfactory As for all other roof drainage systems, an effective periodic maintenance routine must be implemented to prevent the accumulation of debris (e.g. leaves) from blocking outlets and gutters. Syphonic action with resultant flow rates within the system will ensure that the interior of pipework is self cleaning. Performance in fire Satisfactory. Where roofs must have a fireresistance rating, a rational design must be undertaken by an approved competent person If necessary, outlets and pipe-work can be readily removed and replaced to accommodate alterations and additions to existing buildings Geberit HDPE outlets, pipes and fittings are combustible and may ignite and burn when exposed to fire Table 3: Quality management system Aspects of performance Quality management system Opinion of Agrément South Africa The certificate holder s quality management system complies with Agrément South Africa s requirements. Properly applied, it will ensure that quality in the manufacture and installation of drainage systems will be maintained consistently. Explanatory notes Agrément South Africa s requirements are based on SANS 9001 SANS 9001: Quality management systems Requirements Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 10 of 25

11 PART 3: TECHNICAL DESCRIPTION General description The Geberit Pluvia Syphonic Roof Drainage System comprises: stainless steel, upvc coated steel or HDPE roof rainwater outlets with 56 mm or 90 mm diameter spigots HDPE pipes and fittings as certificated in Agrément certificate 2011/392: Geberit HDPE Above Ground Soil and Waste Drainage System, which include: o pipes and access pipes o 45 and 90 bends o 45 branch fittings o reducers o expansion sockets (for horizontal installations maximum 110 mm diameter) o single flange and double flange bushings computer software to determine drainage system requirements for each installation Geberit Pluvia Syphonic Roof Drainage Systems are typically used on roofs over 100 m 2. Roofs may be flat, shed-type or normal pitch roofs, dome shaped or arched roofs of various curvatures. A wide range of contact sheets and accessories are available, which allows installation of the outlets on various roof coverings. Geberit Pluvia outlets can also be converted into safety outlets with an additional installation kit. Outlets are available in various capacities as follows: 6, 12, 25, 45, 60 and 100 litre/second. To prevent water leaks in roofs at outlets, they may be fitted with metal flanges for welding to metal roof gutters; contact foils or sheets to flash against polymer and bitumen-based roofing membranes, respectively. Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 11 of 25

12 Outlets may also be fitted with thermal insulation to prevent condensation occurring in or under roofs at and below outlets. For trafficked areas, outlets may be fitted with load-bearing (150 or 1500 kg) capacity gratings. On inverted roofs where stone ballast has been used (gravel size 8 to 16 mm), Pluvia gravel rings may be installed around outlets to prevent ingress of stone. SANS/ISO 9001: Quality management systems Requirements Components are manufactured from stainless steel, upvc coated steel or HDPE. The HDPE components are injection moulded while steel components are pressed and/or machined from sheet metal. Quality control is carried out on all components in accordance with the requirements of ISO 9001: SANS 8770: Plastics piping systems for soil and waste discharge (low and high temperature) inside buildings Polyethylene (PE) Pipes, adaptors and fittings are manufactured from black PE80 HDPE in accordance with the requirements of SANS 8770: The Geberit range of pipes and available pressure classes are indicated in Tables 1 to 3, respectively, while the Geberit Pluvia outlets and accessories are indicated in Table 4. Design of drainage systems Systems are designed in accordance with the requirements of SANS SANS /EN : Gravity drainage systems inside buildings Roof drainage, layout and calculation L Roofs and SANS /EN The system s design flow capacity relies on syphonic principles and is therefore designed to ensure priming in the pipes downstream of the outlets for rainfall intensities equal to and higher than the design rainfall intensity. At rainfall intensities too low to enable symphonic action, the system will operate as a conventional drainage system. Geberit Pluvia software is an integral part of the system and ensures that the most economic and effective design is achieved. Only persons trained and approved by Geberit Southern Africa (Pty) Ltd are authorised to make use of Geberit s software. Outputs from the Geberit software includes: isometric drawings Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 12 of 25

13 hydraulic calculations (flow rate, velocity, pressure loss and pressure for each pipe and, where applicable, percentage air content) material lists ready-to-mail tender quantities. In all cases, provision is made for flow greater than the maximum flow capacity of outlets to be accommodated by emergency outlets or by suitably placed overflows. Delivery and site handling SANS L Roofs: The application of the National Building Regulations Outlets are fitted with polystyrene inserts and delivered to site in cardboard boxes. Inserts remain in place until the roof is nearing completion. Installation Installation is carried out in accordance with the instructions contained in the Geberit Pluvia Application Technique manual. Maintenance Syphonic flow ensures that pipes and fittings in the system are self cleansing, however, an effective maintenance routine should be implemented by the building s owner to ensure that debris (e.g. leaves, paper etc.) does not block rainwater outlets at roof or gutter level. Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 13 of 25

14 Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 14 of 25

15 Table 1: Geberit standard pipes for waste and drainage pipe systems (excerpt from Geberit HDPE Piping Systems Catalogue 2011/2012 document) Table 2: Geberit standard pipes for waste and drainage pipe systems indicating pressure classes, i.e. PN values in bar (excerpt from Geberit HDPE Application Technique document) Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 15 of 25

16 Table 3: Geberit standard pipes between (200φ - 315φ) of pressure class PN4 (i.e. maximum allowable operating pressure of 4 bar) pipes for drainage pipes with high negative pressures in the Pluvia system (excerpt from Geberit Piping Systems Catalogue 2011/2012 document) Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 16 of 25

17 Table 4: Geberit 12 l/s Pluvia syphonic roof drainage outlets (excerpt from Geberit Piping Systems Catalogue 2011/2012 document) Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 17 of 25

18 Table 4 (continued): Geberit 12 l/s Pluvia syphonic roof drainage outlets (excerpt from Geberit Piping Systems Catalogue 2011/2012 document) Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 18 of 25

19 Table 4 (continued): Geberit 12 l/s Pluvia syphonic roof drainage outlets (excerpt from Geberit Piping Systems Catalogue 2011/2012 document) Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 19 of 25

20 Table 4 (continued): Geberit 12 l/s Pluvia syphonic roof drainage outlets (excerpt from Geberit Piping Systems Catalogue 2011/2012 document) Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 20 of 25

21 Table 4 (continued): Geberit 12 l/s Pluvia syphonic roof drainage outlets (excerpt from Geberit Piping Systems Catalogue 2011/2012 document) Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 21 of 25

22 Table 4 (continued): Geberit 12 l/s Pluvia syphonic roof drainage outlets (excerpt from Geberit Piping Systems Catalogue 2011/2012 document) Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 22 of 25

23 Table 4 (continued): Geberit 12 l/s Pluvia syphonic roof drainage outlets (excerpt from Geberit Piping Systems Catalogue 2011/2012 document) Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 23 of 25

24 Table 5: Geberit 25 l/s Pluvia syphonic roof drainage outlets (excerpt from Geberit Piping Systems Catalogue 2011/2012 document) Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 24 of 25

25 Table 5 (continued): Geberit 25 l/s Pluvia syphonic roof drainage outlets (excerpt from Geberit Piping Systems Catalogue 2011/2012 document) Agrément Certificate 2011/393 : Geberit Pluvia Syphonic Roof drainage system Page 25 of 25