Presentation on theme: "151 MODERN METHOD OF CONSTRUCTION (PART 1)"— Presentation transcript:
1151 MODERN METHOD OF CONSTRUCTION (PART 1) Dr f Dejahang (BSc CEng, BSc (Hons) Construction Mgmt, MSc, MCIOB, PhD)
2MODERN METHOD OF CONSTRUCTION Revisions to Building RegulationsBuilding Regulations in the past were only concerned only with the health and safety of people in and around buildings.More recently the Regulations have been broadened to cover the performance of buildings.This includes thermal and acoustic performance.
3MODERN METHOD OF CONSTRUCTION House builders are concerned with meeting higher standards, but with the prospect that performance might be tested after construction.This can lead to costly remedial work if performance falls short of the standard required.
4MODERN METHOD OF CONSTRUCTION Some house builders are looking at MMC as a potential way of providing more predictable performance in the completed dwelling.
5WHAT ARE MODERN METHODS OF CONSTRUCTION? Modern methods of construction is a collective term used to describe a number of construction methods.The methods being introduced into UK house building differ significantly from so-called conventional construction methods such as brick and block.
6MODERN METHOD OF CONSTRUCTION Housing Corporation-classificationsystem for dwellingsOff-site manufactured – VolumetricOff-site manufactured – PanellisedOff-site manufactured – HybridOff-site manufactured – Sub-assemblies and componentsNon off-site manufactured modern methods of construction
7MODERN METHOD OF CONSTRUCTION Definition based on attributes such as efficiency and quality.Most MMC being constructed at present is subject to Housing Corporation grants.The information in this PPT is therefore based on that system
8Volumetric construction Three-dimensional units produced in a factory, fully fitted out before being transported to site and stacked onto prepared foundations to form the dwellings
10MODERN METHOD OF CONSTRUCTION VOLUMETRIC / MODULAR CONSTRUCTION Volumetric construction (often referred to as modular construction) involves the production of three-dimensional units in controlled factory conditions, prior to transportation to site.
11MODERN METHOD OF CONSTRUCTION Modules can be delivered to site in a variety of formssome may simply be a basic empty shell awaiting on-site finishingothers may have already been completely fitted out with all the necessary internal/external finishes and services, and be purely ready for on-site assembly.
12MODERN METHOD OF CONSTRUCTION The maximum size of a volumetric unit is only really determined by the practicalities of transportation, road and site access.The strength and rigidity of the modules is a very important factor and must be sufficient enough to allow them to be securely transported and craned into place on-site without being damaged.
13MODERN METHOD OF CONSTRUCTION The majority of the volumetric construction in the UK to date has been used in:Hotelsstudent accommodationhealth authoritiesNHS Trusts and fast food sectors.
14MODERN METHOD OF CONSTRUCTION Family-sized accommodation is becoming increasingly popular.Terraced ‘town-house’ might typically be broken down in four basic modules, plus a roof and even possibly a dormer window module.
15MODERN METHOD OF CONSTRUCTION Weatherby Building System (WBS’s) range of systems are ideal for use with volumetric modules and include traditional polymer cement renders, thin-coat silicone & acrylic finishes and brick slip cladding, which can all be applied either prior to site delivery or after the modules have been finally positioned on-site.
16MODERN METHOD OF CONSTRUCTION Some of the benefits of VolumetricConstructionMore cost effective that traditional methods of constructionRapid on-site assembly timeImproved qualityReduced defects & snagging
17MODERN METHOD OF CONSTRUCTION Less disruption on-siteBetter predictability and controlGood thermal, acoustic and wind resistant propertiesFantastic choice of external finishes available
21MODERN METHOD OF CONSTRUCTION Arquitectonica Trinity Place San Francisco, California
22MODERN METHOD OF CONSTRUCTION Arquitectonica Trinity Place San Francisco, California
23MODERN METHOD OF CONSTRUCTION The buildings are conceived as a series of rectangular prisms that rest on each other. Each building has a different volumetric composition that results in an individual expression within the common vocabulary of the block.
24MODERN METHOD OF CONSTRUCTION The arrangement of volumes is intended to form a multidimensional neighborhood of buildings, with some structures expectedly anchored firmly on the ground, some less expectedly suspended above other volumes, some informally overlapping.A large vertical “gateway,” with a grand staircase, leads up to the interior park-like courty
26MODERN METHOD OF CONSTRUCTION Panellised construction systemsFlat panel units built in a factory and transported to site for assembly into a three-dimensional structure or to fit within an existing structure
27MODERN METHOD OF CONSTRUCTION Systems can include wall, floor and roof panels to create the complete structural shell.Factory-made structural floor and roof panels are known as ‘cassettes’.
28MODERN METHOD OF CONSTRUCTION There are many different types of panel, theMain-types are:Open panels: panels delivered to site where insulation, windows, services and linings are fitted.All structural components are visible.
29MODERN METHOD OF CONSTRUCTION Panels can be structural (transmitting load to the foundations) or non-structural (used as non-load bearing separating walls and partitions).
30MODERN METHOD OF CONSTRUCTION Closed panels: panels based on a structural framing system (such as the type used for open panel systems), which can have factory fitted windows, doors, services, internal wall finishes and externalcladding.The internal structural components can only be seen around the perimeter of the panel.
31MODERN METHOD OF CONSTRUCTION Concrete panels: structural wall panels, which can include cladding (often bricks or brick slips), insulation materials, windows and doors.Composite panels: panels made from a combination of different materials that act together to provide structural support.
32MODERN METHOD OF CONSTRUCTION Structural insulated panels are a specific form of composite panel.Structural insulated panels (SIPS): sandwich construction comprising two layers of sheet material bonded to a foam insulation core.They do not rely on internal studs for their structural performance.
33MODERN METHOD OF CONSTRUCTION Used primarily as wall and roof panels.Infill panels: non-loadbearing panels inserted within a structural frame.Any type of panel can be used although framed panels are more common.Masonry can also be used.it
34MODERN METHOD OF CONSTRUCTION Curtain walling: vertical building enclosure system that supports no loads other than its own weight and the environmental loads that act upon
35MODERN METHOD OF CONSTRUCTION Volumetric units integrated with panellisedsystemsHybrid construction is also referred to as semivolumetric construction.Highly serviced areas such as kitchens or bathrooms can be constructed as volumetric units, with the rest of the dwelling constructed with panels.
37MODERN METHOD OF CONSTRUCTION What is SIP's, Structural Insulated Panels?
38MODERN METHOD OF CONSTRUCTION Steel SIP's are engineered panels made from a dense core of EPS (expanded polystyrene) sandwiched between two exterior layers of galvanized steel, resulting in a solid one-piece that provides structural framing, insulation, and exterior sheathing.The 200mm wide interlocking panels are strong