CI/SfB. P364 July Technical Handbook

Transcription

1 St r u c tura l P ro d u c ts CI/SfB (28) Hh2 P364 July 2011 Technical Handbook

2 Kingspan Toolkit Software The Toolkit series has become the leading cold rolled steel and floor decking design software in the industry and is now used by structural engineers in over 1000 practices in the UK. The structural design software has been used industry wide to save valuable design time. Download the latest version from our website: or telephone our Marketing Department on +44 (0) for a CD. The contents of this Technical Handbook and CD are meant as a general introduction to Kingspan Structural Products and any purchaser, specifier or user retains the entire responsibility for satisfying himself, independently of anything herein, as to the suitability or fitness for purpose of any Kingspan product or system.

3 Multideck 50-V2 8 Specification and Design 9 Load Tables Fire Performance Dramix Load Tables Sound Attenuation 22 Multideck 60-V2 24 Specification and Design 25 Load Tables Fire Performance Dramix Load Tables Sound Attenuation 41 Multideck 80-V2 42 Specification and Design 43 Load Tables Fire Performance Dramix Load Tables Sound Attenuation 54 Multideck Specification and Design 57 Load Tables Fire Performance Sound Attenuation 65 Construction Details 66 Multideck 50-V Multideck 60-V2 and 80-V Multideck Sitework 84 Multideck Weights 85 Pack ID Primary Fixings 88 Shear Studs Formation of Holes 93 Temporary Supports Concrete 98 Estimating Concrete Volumes 99 Reinforcement 100 Dramix Steel Fibres Estimating and Ordering 104 Accessories and Service 107 Accessories 107 Suspension Systems Uni-Wedge Universal Clamp Order Forms References 113

4 Kingspan Structural Products The Company Kingspan Structural Products is one of Britain s leading designers and manufacturers of structural steel components for the construction industry. Based in Sherburn, North Yorkshire Kingspan operates one of the largest and most advanced production complexes in Europe, manufacturing over 50,000 tonnes of steel products each year. In five decades of trading the company has become established as a market leader renowned for quality products and innovative design. Kingspan Structural Products manufacturing facility Kingspan Structural Products Multideck Floor System High performance, profiled, galvanised steel floor decking for use in the construction of composite floor slabs. The profile may also be used as a permanent shuttering. Multibeam Purlin System A range of purlin sections designed to suit all types of modern roof construction with bay sizes up to 15 metres. Multibeam Cladding Rail System A range of cladding rails designed specifically to support metal clad walls in horizontal or vertical applications on all kinds of main supporting structures. Multichannel Steel Sections A range of pre-engineered, structural channel sections designed to complement the Multibeam purlin and rail systems. Multichannel is an ideal solution for horizontally laid cladding and is particularly suitable for mezzanine floors, volumetric units. Multichannel can be an effective substitute for conventional hot rolled sections and timber. Unique pre-engineered end connections reduce components and simplify detailing. Commitment It is our commitment and professional approach that has enabled the company to establish its outstanding reputation for service, quality and to maintain its lead in a highly competitive field. Further information on these products is available in technical handbook, reference P128. Quality Assurance Quality assurance is a fundamental feature of the Kingspan Structural Products operating policy. From initial material testing for yield strength and thickness through to delivery on site all aspects of quality and service are monitored ensuring compliance with the requirements of BS EN ISO 9001:2008 (Quality management systems. Requirements). CE Marking Kingspan Structural Products have been accredited at the highest execution class EXC4, allowing Multideck to be used on all types of construction. The accreditation was carried out by the Steel Construction Certificate Scheme (SCCS). Gold Standard Kingspan Structural Products have been awarded the Gold Standard under the Steel Construction Sustainability Charter (SCSC). The Gold Standard was awarded after a successful audit under SCSC rules. This included demonstrating the implementation of a range of management systems, including OHSAS 18001, BS EN ISO and BS EN ISO

5 Sustainability Reuse Steel does not lose its strength or stiffness over time so remains a viable product for reuse. Assembly joints between components can be easily dismantled at any time to facilitate reuse. Sections can be recut to length and reholed to suit a revised use. Recycling Steel is one of the world s most recycled materials with over 40% of new steel made from recycled steel. Kingspan s suppliers encourage, promote and assist in the return of steel for recycling. Certification Kingspan s products are manufactured from the highest quality materials to rigorous quality control standards, approved to BS EN ISO 9001:2008 (Quality management systems. Requirements). Kingspan manufacturing plants are BS EN ISO 14001: 2004 (Environmental management systems. Requirements with guidance for use) and BS OHSAS 18001: 2007 (Occupational health and safety management systems. Requirements) accredited. This simple coherent business management system enables the organisation to successfully achieve its purpose and mission to ensure that quality; safety and the environment are considered in all aspects of the business process. Further information on these certifications can be found on our website Customer Service Experience From concept and design to manufacture and site installation, Kingspan Structural Products has an unmatched degree of experience with over four decades of experience and technical expertise in all aspects of steel construction. Kingspan remain focused on servicing the ever changing need of the construction industry. Technical Excellence At Kingspan Structural Products we are committed to advancing technology within the construction industry. Working in conjunction with the world s leading experts, continually refining and testing new and existing products, while enhancing our reputation for technical excellence and the establishment of higher standards in the industry. Specialist Team Kingspan offer a comprehensive advisory service to customers, specifiers and contractors on all aspects of specification and use of our product range. Our specialist team of design engineers is available to answer technical queries regarding the use of our products in any application. Our internal sales staff and customer services department provide a friendly and efficient service from initial enquiry through to site delivery and after sales. Area Sales Managers Personal contact is important. Our specially trained regionally based Sales Managers are on hand to discuss your project personally and advise on the application and use of Kingspan structural products. Our Area Sales Managers are also trained to install and update our time saving Toolkit design software. Toolkit is available to all specifiers and users of our product range, as part of our comprehensive service package. 5

6 Kingspan Multideck Profiled Steel Floordeck Welcome to the Kingspan Multideck floordeck handbook. Multideck profiles are high performance profiled galvanised steel decks manufactured in high yield steel for use in the construction of composite floor slabs. This publication contains complete technical information on the following products manufactured by Kingspan Structural Products. Multideck 50-V2 For minimum slab depth and robust acoustics Multideck 60-V2 Our most popular deck suitable for most applications Please see Multideck 50-V3 Brochure for updated 50-V2 information 50mm Dovetail rib profile, maximising deck bond to concrete Minimum slab depth of 100mm Spans up to 4.0m unpropped Gauge range 0.9mm through 1.2mm for economic solutions Shear keys on flange and webs of ribs gives class leading load capacity 1 hour fire performance with 100mm slab depth Fire performance up to 4 hours Acoustic robust solution Tested Acoustic Performance Report available from the Kingspan Technical Department 60mm trapezoidal profile giving maximum strength Spans up to 4.5m unpropped Gauge range 0.9mm through 1.2mm for economic solutions Efficient concrete cross section using up to 20% less concrete than other decks 1 hour fire performance with 130mm slab depth Fire performance up to 4 hours 1.0m cover width for rapid lay of deck on site Acoustic robust solution Optimised for composite beam design 6

7 Multideck 80-V2 For greater spans and concrete savings Multideck 146 For long spans up to 6 metres 80mm trapezoidal profile giving maximum strength Spans up to 5.0m unpropped Gauge range 1.0mm through 1.2mm for economic solutions Efficient concrete cross section maximising performance 1 hour fire performance with 140mm slab depth Fire performance up to 4 hours Acoustic robust solution 146mm trapezoidal profile giving maximum strength Spans up to 6.0m unpropped Gauge range 1.2mm and 1.5mm for economic solutions Efficient concrete cross section using up to 31% less concrete than other decks 1 hour fire performance with 215mm slab depth Fire performance up to 4 hours Acoustic robust solution Spans up to 6 metres without the need for temporary props and uses minimal concrete 7

8 Multideck 50-V2 Contents Specification and Design 9 Load Tables 11 Fire Performance 17 Dramix Load Tables 20 Multideck 50-V2 is a dovetail profile deck with a depth of 50mm providing spans up to 4m unpropped. Key benefits include: Greater Design Efficiency The larger range of Multideck gauge thicknesses allow much closer matching of design requirements and deck performance. Quicker Installation No temporary supports required under most conditions. A wide range of accessories allows for easy installation of ceilings and services. Technical Support Kingspan Toolkit software includes comprehensive composite floor design software which allows the user to easily select the right Multideck solution. The design software is available for download from the web site The Multideck design department provides a comprehensive engineering and advisory service to specifiers and end users on the use of the Multideck range of composite decks. Please see Multideck 50-V3 Brochure for updated 50-V2 information Two Towers, Arnhem, Netherlands. Photo Courtesy of MSW (UK) Ltd. 8

9 Multideck 50-V2 Specification and Design Multideck 50 Profile and Dimensions (mm) 600mm nominal 150mm 40mm 20mm 51mm gauge 5mm 17mm Gauge = 0.9mm, 1.0mm, 1.2mm Section Properties per Metre Width 15mm Maximum length: 12 metres Height to Second Ultimate Moment Normal Self Weight Neutral Axis Moment Steel Capacity (knm/m) Thickness of Area Area (mm) (kg/m 2 ) (kn/m 2 ) Sagging (cm 4 /m) (mm 2 /m) Sagging Hogging mm mm mm Material Specification 350N/mm 2 Steel Steel strip for Multideck 50-V2 complies with BS EN and BS EN 10326: 2004 with a guaranteed minimum yield strength of 350N/mm 2 and a minimum total coating mass (including both sides) of 275g/m 2. Concrete Volumes and Specification Load / span tables are based on Grade C25/30 concrete, having a design strength of 30N/mm 2. Solutions using other concrete strengths are possible with the Multideck design software. Density of normal weight concrete: 2400kg/m 3 at wet stage. Density of lightweight concrete: 1900kg/m 3 at wet stage. Rake Cutting Pre-delivery cutting of sections is available. Please contact our Sales Department for details. Volume and Weight of Composite Slabs Reinforcement Mesh or bar reinforcement of the slab to control cracking in the concrete at all intermediate supports is required in BS 5950: Part Steel reinforcement for crack control in the concrete or fire engineering purposes should be in accordance with British Standards: Hot rolled bars BS 4449: 1997; Mesh reinforcement BS 4483: A reinforcement solution using Dramix Steel Fibres from Bekaert is available, see pages 101 to 103 for details. Embossments The unique patented combination of embossments on each face of the dovetail provide mechanical connection to enhance the bond between the harden concrete and the deck. References Please see Multideck 50-V3 Brochure for updated 50-V2 information Engineers are advised to consult the Steel Construction Institute / The Metal Cladding and Roofing Manufacturers Association (SCI / MCRMA) Technical Paper 13 Composite Slabs and Beams using Steel Decking: Best Practice for Design and Construction. Weight (kn/m 2 ) Slab Concrete Normal Weight Lightweight Depth Volume Concrete Concrete (mm) (m 3 /m 2 ) Wet Dry Wet Dry Notes: 1 Important concrete volumes do not take into account deflection. 2 Excludes weight of steel decking and relates only to weight of concrete. 3 Concrete volumes are based upon a calculated minimum value (nominal slab depth). Account should be taken of deck and supporting structure deflections. 9

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11 Multideck 50-V2 Load Tables Multideck 50 When using load tables for Multideck 50-V2 please take into consideration the following notes: 1 The table shows the maximum span in meters of the Multideck product for the applied loads and slab depths shown. Values are shown for each gauge where the deck is single span or double spans, plus values for propped spans during construction. 2 Construction stage span capacity are generally noted under the 4kN/m 2 load and are shaded. For confirmation of maximum un-propped spans see page The span values are based on the use of a minimum 100mm bearing support. Where the bearing exceeds 100mm the span capacity can be increased. See example below. 4 Deck must lie flat on all supports beams. Point only contact will affect the design loading. 5 The self weight of the slab has been taken in to account in the table and should not be included in the applied loading. 6 All tabulated span capacities include applied construction stage load of 1.5kN/m 2 for spans of 3.0m or larger. For spans less than 3.0m the construction load is 4.5/span(m) kn/m 2. 7 The composite slab should meet the requirements of BS5950 Part with regard to their composite behaviour under normal loading. 8 The concrete grade is a minimum of C25/30 with a minimum ultimate strength is of 30N/mm 2. 9 Minimum reinforcement mesh sizes shown meet or exceed 0.1% gross cross sectional area of the concrete at the supports. Minimum reinforcement should be increased where:- a) The slab is propped during construction. b) It is required to control the size of cracking in the concrete i.e. where a brittle finishes is applied to the slab. c) There are moving loads. Mesh reinforcement should be placed near the upper edge of the concrete slab in a zone of 15mm to 40mm from the top surface. Concrete cover to reinforcement should be increased where slab exposure dictates. 10 Where in the table the span value is shown in red this shows the maximum permissible span where there is a minimum of one stud per trough 11 Total applied load referred to in the table is a working load derived from the sum of the loads supported by the composite slab (live load, finishes, ceilings, services, partitions). Loads shown are based on Ultimate capacity / 1.6. The slab self weight has already been taken in to account do not include in applied loads. 12 Deflection under construction loading (wet concrete etc) has been limited to that stipulated in BS5950 Part At the composite stage the suggested maximum ratio of slab span to slab depth are 35 for NWC and 30 for LWC to control deflection. 13 For the propped during construction cases the temporary supports should remain in place until the concrete has achieved 75% of it 28 day cube strength often available after 7 days. 14 Where more than one prop is provided they should be equally spaced across the span of the Multideck. 15 Where * appears the addition of props gives no further spanning benefit in these cases. Definition of Span (Construction Stage) When Using Kingspan Load Tables 100mm minimum support c/c Support widths greater than 100mm? The span capacities shown on the following pages can be increased by the difference between the actual support widths and 100mm. The deck span (m) used in the table is based on the (support c/c support bearing) + the deck depth. All values in metres. Example Support widths 140mm and 200mm. Span values can be increased by ( )/2 100 = 70mm. MD50-V2 1.2mm double span deck (no props). 150mm thick slab normal weight concrete. Construction stage span from page 13, 4.0kN/m 2 load column = 3420mm. With support widths of 140 and 200 the increased span capacity is = 3490mm. 100mm minimum Please see Multideck 50-V3 Brochure for updated 50-V2 information 11

12 Multideck 50-V2 Load Tables Normal Weight Concrete Unpropped Load / Span Table (Steel 350N/mm 2 ) Gauge = 0.9mm Slab Min Span Type Depth Mesh Total Applied Load (kn/m 2 ) SLS (Support Condition) (mm) Size Propped Load / Span Table (Steel 350N/mm 2 ) Span (m)* 100 A A A A A A A A A A A A A A A A A A A A Gauge = 0.9mm Slab Min Span Type Depth Mesh Total Applied Load (kn/m 2 ) SLS (Support Condition) (mm) Size Span (m)* 100 A A A A A A A A A A A A A A Notes: Total applied load referred to in the above table is a working load based on combinations of live loads, finishes, ceilings, services and partitions (excluding slab self weight). Figures in red are maximum permissible spans in situations where there is one stud per trough. Permanent Support Temporary Support *See diagram page 11. Please see Multideck 50-V3 Brochure for updated 50-V2 information 12

13 Multideck 50-V2 Load Tables Multideck 50 Normal Weight Concrete Unpropped Load / Span Table (Steel 350N/mm 2 ) Gauge = 1.0mm Gauge = 1.2mm Slab Min Span Type Depth Mesh Total Applied Load (kn/m 2 ) SLS Total Applied Load (kn/m 2 ) SLS (Support Condition) (mm) Size Span (m)* Propped Load / Span Table (Steel 350N/mm 2 ) Span (m)* 100 A A , A A A A A A A A A A A A A A A A A A Gauge = 1.0mm Gauge = 1.2mm Slab Min Span Type Depth Mesh Total Applied Load (kn/m 2 ) SLS Total Applied Load (kn/m 2 ) SLS (Support Condition) (mm) Size Span (m)* Span (m)* 100 A A A A A A A A A A A A A A Please see Multideck 50-V3 Brochure for updated 50-V2 information Notes: Total applied load referred to in the above table is a working load based on combinations of live loads, finishes, ceilings, services and partitions (excluding slab self weight). Figures in red are maximum permissible spans in situations where there is one stud per trough. Permanent Support Temporary Support *See diagram page

14 Multideck 50-V2 Load Tables Lightweight Concrete Unpropped Load / Span Table (Steel 350N/mm 2 ) Gauge = 0.9mm Slab Min Span Type Depth Mesh Total Applied Load (kn/m 2 ) SLS (Support Condition) (mm) Size Propped Load / Span Table (Steel 350N/mm 2 ) Span (m)* 100 A A A A A A A A A A A A A A A A A A A A Gauge = 0.9mm Slab Min Span Type Depth Mesh Total Applied Load (kn/m 2 ) SLS (Support Condition) (mm) Size Span (m)* 100 A A A A A A A A A A A A A A Please see Multideck 50-V3 Brochure for updated 50-V2 information Notes: Total applied load referred to in the above table is a working load based on combinations of live loads, finishes, ceilings, services and partitions (excluding slab self weight). Figures in red are maximum permissible spans in situations where there is one stud per trough. Permanent Support Temporary Support *See diagram page

15 Multideck 50-V2 Load Tables Multideck 50 Lightweight Concrete Unpropped Load / Span Table (Steel 350N/mm 2 ) Gauge = 1.0mm Gauge = 1.2mm Slab Min Span Type Depth Mesh Total Applied Load (kn/m 2 ) SLS Total Applied Load (kn/m 2 ) SLS (Support Condition) (mm) Size Span (m)* Propped Load / Span Table (Steel 350N/mm 2 ) Span (m)* 100 A A A A A A A A A A A A A A A A A A A A Gauge = 1.0mm Gauge = 1.2mm Slab Min Span Type Depth Mesh Total Applied Load (kn/m 2 ) SLS Total Applied Load (kn/m 2 ) SLS (Support Condition) (mm) Size Span (m)* Span (m)* 100 A A A A A A A A A A A A A A Please see Multideck 50-V3 Brochure for updated 50-V2 information Notes: Total applied load referred to in the above table is a working load based on combinations of live loads, finishes, ceilings, services and partitions (excluding slab self weight). Figures in red are maximum permissible spans in situations where there is one stud per trough. Permanent Support Temporary Support *See diagram page

16 Kingspan Multideck was used in the construction of the Meadowhall Extension in Sheffield, UK. Photo Courtesy of MSW (UK) Ltd. 16

17 Multideck 50-V2 Fire Performance Mesh Multideck 50 1 The fire resistance tables for Multideck 50-V2 on the following pages are based upon fire test data from full scale tests performed at the Warrington Fire Research Centre UK, May All stated slab depths comply with the minimum fire insulation criteria of BS 476: Part The composite slab is assumed to be continuous over one or more intermediate supports. i.e. minimum double span. 4 The fire resistance load tables are for continuous spans only with no propping. For propped and single span conditions use the Kingspan Toolkit Software or contact Kingspan Technical Services. 5 Minimum laps should be 300mm for A142 mesh and 400mm for A193 and A252 mesh. 6 The mesh should be placed between 15 and 40mm from the upper surface of the slab (this range caters for lap areas). 7 The tables are based upon Grade 30 concrete, reinforcement having a yield strength of 460N/mm 2. 8 The tables must be read in conjunction with load / span tables for Multideck 50-V2 to verify the structural integrity of the composite slab. 9 The values in all the tables are relevant to unpropped construction. 10 The tables take into account the reduced partial factor of 0.8 as permitted in BS 5950: Part 8 for non-permanent imposed loads. The tables are presented in terms of total specified imposed load (non-permanent and permanent). It is assumed that the permanent imposed loads for partitions, finishes, ceilings and services are equivalent to 1.7kN/m 2 in all cases. The tables are therefore appropriate for office type applications. For other applications where the imposed loads are almost entirely permanent the total load should be adjusted accordingly before reading from the tables, eg: 150mm normal weight concrete plantroom slab and A142 mesh. 7.5kN/m 2 live load. 1.2kN/m 2 50mm screed finish 0.5kn/m 2 ceilings and services. 1 hour fire rating. Multideck 50-V2 profile Total applied load = /0.8 = kN/m 2. From table overleaf maximum span = 3.60m. 11 The * denotes that the mesh provided, although satisfying the fire resistance requirement, does not comply with the minimum anti-crack reinforcement requirement of BS 5950: Part 4. Refer to standard load / span tables for minimum mesh requirements. 12 For loan / span conditions beyond the scope of these tables the Fire Engineering Method as detailed in the SCI Publication 056 should be adopted or use Kingspan Toolkit Software. Please contact our Technical Services Department for advice. See following pages for Multideck 50-V2 Fire Resistance Tables. 13 These tables apply to all gauges 0.9mm and above. Please see Multideck 50-V3 Brochure for updated 50-V2 information Note: For load / span conditions beyond the scope of these tables, the Kingspan Multideck design software should be used to check for a solution. Toolkit Design Software provides an accurate and detailed analysis and Kingspan encourages its use for all design checks. 17

18 Multideck 50-V2 Fire Resistance Load Tables Normal Weight Concrete Unpropped Construction Fire rating: 1.0 hour Fire rating: 1.5 hours Slab Min Depth Mesh Total Applied Load (kn/m 2 ) Total Applied Load (kn/m 2 ) (mm) Size Span (m) Span (m) 100 A A A A A A A A A A A A A A A A A A A A A A A A A A A Normal Weight Concrete Unpropped Construction Fire rating: 2.0 hours Slab Min Depth Mesh Total Applied Load (kn/m 2 ) (mm) Size Span (m) Please see Multideck 50-V3 Brochure for updated 50-V2 information 100 A A A A A A A A A A A A A A A A A A A A A A A A A A A Note: These values are for unpropped spans only. For cases where the deck is propped please use the Kingspan Toolkit Software.

19 Multideck 50-V2 Fire Resistance Multideck 50 Load Tables Lightweight Concrete Unpropped Construction Fire rating: 1.0 hour Fire rating: 1.5 hours Slab Min Depth Mesh Total Applied Load (kn/m 2 ) Total Applied Load (kn/m 2 ) (mm) Size Span (m) Span (m) 100 A A A A A A A A A A , A A A A A A A A A A A A A A A A A Lightweight Concrete Unpropped Construction Fire rating: 2.0 hours Slab Min Depth Mesh Total Applied Load (kn/m 2 ) (mm) Size Span (m) Please see Multideck 50-V3 Brochure for updated 50-V2 information 100 A A A A A A A A A A A A A A A A A A A A A A A A A A A Note: These values are for unpropped spans only. For cases where the deck is propped please use the Kingspan Toolkit Software. 19

20 Multideck 50-V2 Fire Resistance Dramix Reinforced Concrete 20kg/m 3 RC-80/60-BN Load Tables (see pages ) 1 Hour Fire Rating Normal Weight Concrete Gauge 0.9mm Gauge 1.0mm Slab Depth Total Applied Load (kn/m 2 ) Total Applied Load (kn/m 2 ) (mm) Span (m)* Span (m)* Hour Fire Rating Normal Weight Concrete Gauge 0.9mm Gauge 1.0mm Slab Depth Total Applied Load (kn/m 2 ) Total Applied Load (kn/m 2 ) (mm) Span (m)* Span (m)* Please see Multideck 50-V3 Brochure for updated 50-V2 information 2.0 Hour Fire Rating Normal Weight Concrete Gauge 0.9mm Gauge 1.0mm Slab Depth Total Applied Load (kn/m 2 ) Total Applied Load (kn/m 2 ) (mm) Span (m)* Span (m)* Notes: These tables are not applicable to slabs where the deck is supplied in single span lengths (use Multideck Design software to determine suitable bottom bar requirements). These values are for unpropped spans only. For cases where the deck is propped please use the Kingspan Toolkit Software. 20

21 Multideck 50-V2 Fire Resistance Dramix Reinforced Concrete 20kg/m 3 RC-80/60-BN Load Tables (see pages ) 1 Hour Fire Rating Normal Weight Concrete Multideck 50 Gauge 1.2mm Slab Depth Total Applied Load (kn/m 2 ) (mm) Span (m) Hour Fire Rating Normal Weight Concrete Gauge 1.2mm Slab Depth Total Applied Load (kn/m 2 ) (mm) Span (m) Please see Multideck 50-V3 Brochure for updated 50-V2 information 2.0 Hour Fire Rating Normal Weight Concrete Gauge 1.2mm Slab Depth Total Applied Load (kn/m 2 ) (mm) Span (m) Notes: These tables are not applicable to slabs where the deck is supplied in single span lengths (use Multideck Design software to determine suitable bottom bar requirements). These values are for unpropped spans only. For cases where the deck is propped please use the Kingspan Toolkit Software. 21

22 Multideck 50-V2 Sound Attenuation Kingspan Structural Products have undertaken extensive testing on the acoustic performance of the Multideck range of composite steel deck slabs The testing was carried out on behalf of Kingspan Structural Products by the Steel Construction Institute and resulted in a comprehensive report Acoustic Performance of Kingspan Composite Floors copies of which can be obtained from Kingspan Structural Products technical Department. Predicted Site Acoustic Performance of Floors with Multideck 50-V2 Predicted acoustic performance DnT,w + Ctr (db) For Airborne Sound Description of floor Slab Slab on deck with Slab on deck with Slab on deck with Slab on deck with Slab on deck with depth no ceiling and ceiling and ceiling and ceiling and ceiling and (mm) no floor treatment no floor treatment platform floor (FFT4) battened floor (FFT3) isolated screed to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to 60 Predicted acoustic performance L nt,w (db) For Impact Sound Description of floor Slab Slab on deck with Slab on deck with Slab on deck with Slab on deck with Slab on deck with depth no ceiling and ceiling and ceiling and ceiling and ceiling and (mm) no floor treatment no floor treatment platform floor (FFT4) battened floor (FFT3) isolated screed Please see Multideck 50-V3 Brochure for updated 50-V2 information 120 to 76 to to to to to Note: The tables are based on a minimum concrete density of 2350kgs/m 3 and can be used with mesh or Dramix reinforcement. Lightweight concrete may lead to a reduction in acoustic performance of about 2 to 3 db on the values shown above. Values of DnT,w and Lnw are available from Kingspan Structural Technical Department. The junction details between the walls and floors must be appropriately detailed to ensure that flanking sound is minimised. The values in the table are based on the new (since 2003) measurement index DnT,w+Ctr for airborne sound. The Ctr term is a spectrum adaptation value which is generally negative and adjusts the index to take account of low frequency sounds that often cause problems in residential buildings. Thus the DnT,w +Ctr rating is lower than the DnT,w rating for the same construction. Pre-delivery rake cutting of sections is available. Please contact our Sales Department for details. 22

23 23 Multideck 50

24 Multideck 60-V2 The original and still the most popular deck in the market is a 60mm high, structurally efficient trapezoidal profile providing an excellent composite union between steel and concrete to maximise the load carrying and spanning up to 4.5m (no props). The efficient shape of the deck and resulting composite slab make an excellent option for composite beam design. Key benefits include: Contents Specification and Design 25 Load Tables 27 Concrete Volume Savings Due to its unique profile Multideck 60-V2 requires less concrete than other decks to achieve any given slab thickness. Multideck 60-V2 can save up to 20% concrete volume compared with typical re-entrant profiles. See graph below. Typical Concrete Volume Savings Using Multideck 60-V2 Fire Performance Dramix Load Tables 36 Cubic Metres % +26.7% +24.2% +22.1% 120mm slab 130mm slab 140mm slab 150mm slab Concrete Volume Required Per 1000m 2 Floor Area Multideck 60-V2 Typical 50mm re-entrant profile Note: The above volumes do not take into account deflection. Greater Design Efficiency The larger range of Multideck gauge thicknesses allow much closer matching of design requirements and deck performance. Kingspan Multideck 60-V2 can be used with Dramix Steel Fibre Reinforcement to eliminate mesh in slab design. Quicker Installation The Multideck range has a 1m cover width requiring fewer panels and sidelaps. No temporary supports are required under most conditions. A wide range of accessories allows for easy installation of ceilings and services. Technical Support Kingspan Toolkit software includes comprehensive composite floor design software which allows the user to easily select the right Multideck solution. The design software is available for download from the web site The Multideck design department provides a comprehensive engineering and advisory service to specifiers and end users on the use of the Multideck range of composite decks. 24