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January 2009

Eaves and Rainwater Systems

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xperienced in the construction industry since 1974, Kyrarch specialises in the supply of high quality aluminium products

in functional architectural applications. While remaining efficient and competitive, the company offers a product range which is comprehensive, innovative, durable and decorative to meet the widest parameters of specifier and installer alike. The widest possible range of manufacturing methods are used, observing appropriate building standards and supported by a full technical and installation service.

FASCIA & SOFFIT SYSTEMS 4-5

INDUSTRIAL GUTTERS 18-19

SYSTEM CHOICES 6-7

SPECIAL GUTTER TECHNIQUES 20-21

GUTTER FIXING 8-9

RAINWATER PIPE INSTALLATION 22-23

GUTTER JOINTING 10-11

RAINWATER PIPES 24-25

BOX GUTTERS 12-13

SECURITY RAINWATER PIPES 26-27

HALF ROUND GUTTERS 14-15

MOULDED GUTTERS 16-17

SPECIAL TECHNIQUES 28-29

FLAT ROOF RAINWATER OUTLETS 30-31

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L The early involvement of Kyrarch will highlight options and lead to cost-effective design to satisfy specific practical, cost and aesthetic requirements.

ocated at the junction of two primary elements, the eaves of a building is an important but often overlooked feature. While masking the junction of wall and roof, any eaves system chosen must be able to neatly overcome building tolerances and, since these areas are invariably not easily accessible, be relatively maintenance-free.

traditional eaves construction

This critical interface demands careful attention in both detailing and the selection of materials. Kyrarch offers the specifier practical advice on fascia and soffit installations backed by a wide and adaptable product range to suit virtually any eaves configuration .

THE ADVANTAGES OF METAL EAVES When the essential requirements of an eaves system are evaluated, the advantages of using metal may be clearly seen. Metal offers a combination of versatility, durability and strength. Other materials are unable to match this combination of qualities and their use often leads to complex or inadequate detailing. While non-metalic materials may sometimes appear initially more economic, they are usually not cost-effective when the effects of ongoing maintenance are addressed. Metal products with their manufacturing and recycling processes are usually considered to be less harmful to the environment than alternative shorter-lived materials.

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durable coated aluminium fascia and soffit pressings fabricated to specific project requirements extensive range of compatible downpipes and guttering

EAVES SYSTEM DESIGN One of the major advantages of a metal system is an inherent design adaptability. The qualities of metal and the finishes available provide a wide range of architectural possibilities which can be exploited to either reduce or enhance their visual impact on a project or to make a positive design statement. An eaves system may incorporate movement joints, insulation, fire compartmentation, ventilation, lightning protection and many other secondary functions.

MATERIALS Aluminium is used in eaves assemblies which lends itself to coating with durable finishes, is generally compatibility with different adjoining materials and has favoured aesthetic qualities.

COATINGS The finish to the eaves assembly may match or complement another building element, such as fenestration, or differ entirely. Kyrarch offers a very wide choice, most notably polyester powder coating to most RAL and BS4800 colours, anodising and Plastisol finishes. Steel substrates require galvanising or zinc-spraying for corrosion-resistance. Kyrarch also specialises in providing non-standard colours and finishes to match specified features such as a corporate image or a specific building material.

SPECIAL TECHNIQUES All Kyrarch eaves systems are individually designed to suit customers’ specific requirements. There is virtually no limit to the number of configurations that can be achieved with the systems outlined here. Special techniques, readily available at Kyrarch, provide unlimited scope for the building designer, including multi-facetted eaves and curved planes. Signwriting and other embellishments are all within the service offered by Kyrarch to assist the specifier in developing outline proposals into workable solutions.

CDM

REGULATIONS New health and safety responsibilities placed on the specifier by the Construction Design and Management Regulations give further powerful reasons for promoting the use of metal eaves systems. Metal eaves require considerably less maintenance than many fibrous constructions and have one of the longest lifespans available. Where occasional maintenance is required the very nature of metal systems offers greater rigidity and thereby safer support for ladder contact. Where the constraints of inaccessability prohibit the use of ladders, and where more frequent access is required for cleaning foliage debris, versatile metal systems cater for simple incorporation of tower restraints, harness connections, cradle rails and other purposedesigned safety features.

FASCIA SYSTEMS

A Kyrarch recognises the individuality of building design and the impracticality of rigidly standardised eaves details. A number of standard components can be used separately or as part of a system.

metal fascia can be either used in conjunction with a separate soffit board or be formed as a composite one-piece component. Metal fascias are invariably pressed with a flat face but may incorporate a profile. The gutter can be either in front or behind the fascia, depending on functional and aesthetic requirements. A face-fixed gutter can itself be used to form the fascia if it has sufficient depth. Metal fascias are often fixed over a timber substrate which is part of the roof carcassing. Roof void ventilation may be incorporated in a number of ways, most notably by use of strip ventilators positioned under or above the fascia.

fascia, soffit and concealed gutter can be fabricated to form an integrated element

SUPPORT SYSTEMS The integral design of the support system is critical to the success of the eaves assembly as a whole. It must be suited to the external components and embody tolerance and strength: it may need to incorporate sundry fittings such as harness supports.

complete colour co-ordinated deep eaves systems can be made to order

ONE-PIECE SYSTEMS One-piece fascia-soffit systems are simple and practical giving a rapidly installed pre-finished assembly.The gutter may be either external or contained within the body of the assembly. Usually the supportwork is relatively simple, invariably comprising a series of stout metal brackets secured to the roof edge.

profiled fascias can be made to cover existing fascia boards

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SANDWICH PANELS Sandwich panels are laminates of two pre-finished metal sheets bonded to a core material such as marine plywood, insulation board or pvc sheet. The high strength-to-weight ratio achieved usually allows larger spans between supports with consequent savings. Further savings can be attained by basing dimensions of fascia and soffit on the size of standard building boards. A standard range of compatible fittings and trims is offered together with purpose-made profiles for connection of panels to adjoining building elements.

Sandwich panels are ideal for soffit cladding used with simple trim sections

PLANK SYSTEMS Modular plank systems provide extremely versatile and neat solutions to eaves cladding. Plank systems can be utilised to give either a traditional or modern look to a development and are available in a full range of colours and finishes.

The planks are extruded aluminium sections which interlock with concealed fixings. Matching standard corner and starter trims complete the system and purpose made profiles can be fabricated to order.

CASSETTE PANELS Cassette panels are formed from a single sheet of metal, of suitable gauge, having profiles added on some or all of the edges. The corrugations provide fixing positions and instil rigidity to the sheet for spanning between supports. If necessary extra rigidity can be attained by bonding reinforcement to the rear face. As these products are usually post-finished, small quantities are readily available and the colour range is extensive.

RELATED PRODUCTS Kyrarch also produce a wide range of other metal products......

CAPPING SYSTEMS

COLUMN CASINGS

FLASHINGS

FEATURE BEAMS

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LOUVRE SYSTEMS

DIRECT FIXING This is clearly the most straightforward method of installation, suitable primarily for the smaller sizes of gutter. For geometrical reasons direct fixing has not usually been used on cast guttering but with The method of fixing

the increased use of folded metal systems,

may be determined by

particularly aluminium, this simplest of methods

the style and size of

has gained in popularity.

gutter, exposure to damage and the

The gutter is fixed to the fascia or other substrate

elements, the type of

invariably by screws through pre- slotted holes in

substrate and

the back of the gutter itself. The fixings are

aesthetic

positioned above the waterline, which is the

considerations

highest level of water that the gutter can sustain

A typical bracketed system of gutter fixing

CAST AND EXTRUDED BRACKETS

without overflowing. Direct fixing results in clean lines unobstructed by

Some standard styles

protruding brackets and cost savings by not

of gutter require fascia

having to obtain and fit brackets.

brackets. Traditionally brackets were cast and these are generally considered

CAST BRACKETS

to be the most visually acceptable. Modern extruded gutters can be fitted with matching extruded brackets but equally it is now possible to cast brackets to fit extruded gutter profiles which results in an economic system together with

DIRECT FIXING

traditional stylling.

FOLDED BRACKETS This form of bracket is fabricated from flat metal bar which may not necessarily be the same material as the gutter. An installation, for example, may comprise galvanised steel brackets used in conjunction with aluminium guttering, the steel providing strength and the aluminium providing corrosion resistance.

The Kyrarch topstrap bracket is designed to provide resistance to high wind loads yet be virtually invisible from ground level. The bracket is first fixed to the fascia leaving one screw hole free, which is pre-cut to align with the slotted holes in the rear of the gutter. The gutter is then offered up and screw-fixed through the hole into the fascia. The cantilevered bar which is at the top of the gutter, rather than the bottom, is then bolted to a front lip specifically incorporated in the gutter profile. This method embodies good resistance to external forces, particularly strong winds, whilst keeping all fixing points above the gutter waterline and retaining the uncluttered appearance of a direct fix system.

BRACKET ADAPTIONS Standard cast, extruded or folded brackets may be adapted to suit a specific design requirement or method of installation. Rise-and-fall brackets are mounted on a length of threaded rod supported by a bar which is driven or built into the wall beneath the eaves and is used primarily where no fascia is available. A less obtrusive alternative in this situation is the use of a rafter bracket, which has a bar extending either on top or to one side of the rafters. Brackets may be adapted to suit sloping fascias, recessed fascias, metal roof eaves or any other unusual configuration.

Brackets may be folded to a required gutter profile, whether standard or non- standard, and can be fabricated to suit particular fixing arrangements

A rise-and-fall bracket

Rafter brackets top fix and side fix

T

he jointing between gutter lengths has to meet several criteria. First and foremost it has to be watertight. It also has to maintain

watertightness whilst allowing for building and climatic movement. The integrity of a joint depends very much on the support afforded to the gutter as well as the type and method of sealing. Joints also Apart from purely practical considerations, the method of jointing gutters may be dictated by, or at least influenced by, appearance since perimeter guttering is often a highly visible element in builing facades.

need to be easily inspected and tested. With both practical and aesthetic aspects given due consideration, it remains that jointing methods which are also clean, quick and which can be carried out in adverse weather are naturally to be preferred.

BOLTED JOINT STRAPS

CAST SOCKETS AND SPIGOTS

These have been developed for folded

Traditional cast sytems incorporate a socket

and extruded systems.

(making an external joint) or a spigot (making an

The joint strap provides

internal joint) which is integral on the end of each

a double spigot or

gutter length. This forms an overlap of two

double socket with two

adjacent units including a tolerance gap which is

rows of bolts and a

filled with sealant. The joint is held together with a

mastic seal.

bolt through the sole of the gutter.

The internal joint strap INTERNAL JOINT STRAP

is hidden from view whereas the external

EXTERNAL JOINT STRAP

strap, although visible, is less obstructive to the flow of water and also covers the sealant and the cut end of the gutter.

each bolt hole is slotted to facilitate expansion and contraction and relies on a certain amount of sealant being squeezed into the hole to seal it

DESIGN FEATURES

LOOSE OVERSTRAP JOINTS This strap fits around the outside of the gutter joint to contain the whole assembly but is not actively involved in containing water. The nature of the joint allows for a snug fit and requires no bolts.

RESTRAINED OVERSTRAP JOINTS

LOOSE OVERSTRAP JOINT The loose overstrap joint presents a neat and clean appearance. All cut ends and sealant are contained within the joint strap which is both visually and functionally preferable.

This version of the overstrap joint is designed for the larger sizes of gutter and for the more complex profiles. The strap is attached with small tack welds to one end of the gutter.

JOGGLE AND PUNCH JOINTS

RESTRAINED OVERSTRAP JOINT Gutters with restrained overstrap joints may be installed by direct fixing or, for the larger sizes, may need brackets. Suitably bracketed gutters may be used as hidden gutters behind fascias where there is a considerable saving in installation time compared with joggle and punch systems.

Folded gutters can be jointed without separate straps. A gutter end is expanded and tapered to form a step, called a joggle. This forms a seating for the adjoining straight section of gutter.

JOGGLE AND PUNCH JOINT A row of corresponding holes is punched at each end of the gutter, the sections being joined by bolted connection through the holes, accompanied by a durable mastic sealing strip.

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lthough originally manufactured in cast iron, the vast majority of box gutters are now folded from sheet metal. The profiles

illustrated are fabricated from aluminium. Most box gutters incorporate a tab folded onto the top lip to provide rigidity to the front face and prevent The box gutter, by

surface rippling.

virtue of its simple profile, has the highest flow capacity of any system. It is particularly suitable

A standard range box gutter fixed directly to a board fascia

for use in large typical box gutter profile

projects where its crisp outlines can

slotted holes for direct fixing and adjustment

integrate well with composite metal

overstrap joint

FIXING & JOINTING Most box guttering installations utilize direct fixing and loose overstrap jointing, being the most efficient method and usually the most visually pleasing. Larger profiles may incorporate topstrap

folded tab for face rigidity

brackets and restrained overstrap joints. welded corner component

DESIGN FEATURES

STANDARD RANGE Since box gutters are invariably folded from sheet metal, they can be made to virtually any size. For simplicity, compatability and economy however,

folded aluminium - direct fix - overstrap joints

BF 43 BF 53 BF 64 BF 66 BF 86

100 x 75 mm 125 x 75 mm 150 x 100 mm 150 x 150 mm 200 x 150 mm

this standard range is available. Larger sizes are fabricated with

BT 75 175 x 125 mm BT 88 200 x 200 mm

topstrap brackets to provide maximum resistance against high wind loads.

folded aluminium - galvanised steel topstrap brackets - overstrap joints

CHAMFERED RANGE This is a simple variation on the standard profile, featuring a chamfered front edge to give a softer profile. The

folded aluminium - direct fix - overstrap joints

principal

CF 43 CF 53 CF 64 CF 66 CF 86

100 x 75 mm 125 x 75 mm 150 x 100 mm 150 x 150 mm 200 x 150 mm

characteristics are otherwise the same

CT 75 175 x 125 mm CT 88 200 x 200 mm

apart from a slightly reduced flow capacity.

folded aluminium - galvanised steel topstrap brackets - overstrap joints

T

he round shape lends itself well to casting which explains the predominance of the half-round profile on the general domestic

market. The profile is also produced by the more economical extrusion process. A range of traditional

While some versions of this profile are actually

half-round gutters

semi-circular, and aptly named true half-round,

complete with

most available approximate to only a third of a

conventional fittings

circle and by their nature, are limited to use on

and the modern

relatively small scale buildings with modest water

development of high

catchment.

capacity, deep-flow gutters with direct fixing.

FIXING & JOINTING Cast aluminium COMMON HALF-ROUND

TRUE HALF-ROUND

gutters incorporate traditional matching cast sockets and cast brackets in a traditional style. Extruded aluminium gutters are usually used with cast support bracket

extruded brackets, which maintain the traditional appearance. The Deep-flow system is fixed directly to the substrate and utilises

bolted connection

overstrap jointing.

STANDARD RANGE The standard range offers the usual sizes of cast nominal half round gutters plus a true half round extruded profile which features a double bead and a higher capacity

HC 40 HC 45 HC 50 HC 60

100 mm wide 113 mm wide 125 mm wide 150 mm wide

cast aluminium : common half round - cast brackets - cast sockets

GC 40 100 mm wide GC 45 113 mm wide GC 50 125 mm wide cast aluminium : beaded half round - cast brackets - cast sockets

HE 50 125 mm wide extruded aluminium : true half round - extruded brackets - overstrap joints

DEEP-FLOW The Deep-flow gutter is based on the half round shape but has extended sides to improve the hydraulic capacity. The gutter is fixed by the modern technique of direct fixing with overstrap jointing.

ME 53 125 x 75 mm ME 75 175 x 125 mm

extruded aluminium - direct fix - overstrap joints

T

he term moulded covers a great variety of styles and sizes of guttering, some similar in overall shape to box gutters and others

similar to half-round, but all featuring a curved or patterned front. Numerous variations had their origins in the heyday of cast iron when local manufacturers each had their specialities. Many of these patterns are no longer available except as From hundreds of

very cumbersome and expensive iron

patterns available for

sand-castings. The gutters featured here are the

cast iron, only a very

modern day equivalents of these ornamental styles.

few have progressed to cast aluminium.

cast support bracket

Some have been

FIXING & JOINTING

developed into extruded aluminium profiles and some

Cast aluminium

moulded gutters have

gutters incorporate

been imitated by the

traditional matching cast sockets and cast

process of folding sheet metal. We offer

brackets. Extruded

cast socket holed to receive bolted connection

both a standard range

aluminium gutters

of moulded gutter and

utilise either a similar

purpose made folded

cast bracket or a more

profiles.

economical extruded bracket with bolted

CAST SOCKET JOINT slotted holes for direct fixing to substrate

joint straps. Folded gutters can always utilise either loose or restrained overstrap joints and folded aluminium brackets.

overstrap profile

JOINT STRAP

VICTORIAN OGEE GUTTERS A cast section with limited hydraulic capacity suitable for small installations with low rainfall catchment

VC 40 100 mm wide VC 45 113 mm wide VC 50 125 mm wide cast aluminium - cast brackets - cast sockets

PATTERN 46 OGEE GUTTERS Incorporates an ogee roll on the front of a box shaped gutter and is the most popular of the moulded range. It is available primarily as an extrusion with overstrap joints. The folded versions incorporate overstrap joints and the larger sizes are designed with topstrap brackets for increased wind resistance

PE 43 PE 54 PE 64 PE 86

100 x 75 mm 125 x 100 mm 150 x 100 mm 200 x 150 mm

extruded aluminium - direct fix bolted joint straps or overstrap joints

PC 43 100 x 75 mm PC 54 125 x 100 mm PC 64 150 x 100 mm cast aluminium - direct fix or bracket fix bolted spigot joints

folded aluminium - direct fix - overstrap joints

PF 43 PF 54 PF 64 PF 86

100 x 75 mm 125 x 100 mm 150 x 100 mm 200 x 150 mm

PT 75 175 x 125 mm PT 88 200 x 200 mm folded aluminium - GAM steel topstrap brackets overstrap joints

A

s these gutters are invariably used in locations inboard from a buildings perimeter, the consequences of leakage

are greater since leaking water will fall within the building. Considerations of rainfall rate, flow The term Industrial gutter applies to those which are not normally visible, are entirely functional and are used principally for drainage at parapet and valley locations.

capacity and joint sealing have therefore added importance. By their very nature, industrial gutters are liable to foot traffic for inspection and maintenance which also needs due consideration and which may dictate gauge of metal, profile and fixing details. The choice of material usually lies between steel or aluminium. Aluminium is increasingly used for industrial guttering which, although not possessing the inherent strength of steel, is much lighter to aid installation and can provide the necessary strength and rigidity by use of thicker gauges. Unlike steel, aluminium does not require an applied protective coating.

FIXING & JOINTING Restrained overstrap jointing is preferable for the larger sizes of gutter and for difficult profiles. Joggle and

gutter support bracket in material matching the gutter, usually galvanised steel

punch jointing can also be used. Where soffit access is not convenient, clip-nuts can be specified to facilitate assembly. Industrial gutters were commonly fitted to metal or timber supportwork, often laying on a plywood or

restrained overstrap joints between gutter lengths

other board substrate. Hanging brackets spaced at intervals is now the more common

TYPICAL INDUSTRIAL GUTTERING

method of support.

It is now normal practice to install industrial gutters with integral insulation as opposed to the once traditional boxing out of the underside to provide a housing for thermal insulation. Insulation is usually a CFC-free rigid foam bonded to the gutter profile and covered with a thinner gauge internal metal liner, either galvanised steel or aluminium or Plastisol coated steel.

An integrally insulated valley gutter. To prevent the build up of ice and snow in the gutter it is good practice to use insulation at a lower rating than the roof

Gutters can incorporate integral outlets or allow for the use of proprietary components such as syphonic outlets

Production of a gutter to a specifier’s design is a regular requirement and may be achieved using a

Gutter widths should be greater than the depth

number of materials and methods. Folding from sheet metal is the most versatile method as it lends itself to a wide choice of profiles, sizes and materials. There are usually no tooling costs involved but production is subject to certain machine restraints, for example, the spacing of bends. One prime consideration to ease production is to keep the gutter width greater than its depth. Curved profiles can be produced by multiple pressing which is often indistinguishable from a true curve.

Although governed by manufacturing limitations, the scope for differing designs is almost unlimited

Brackets can be cast to match custom-made gutter profiles

COMPOUND ANGLES The necessity for compound angles arises from the intersection of raking eaves and normal horizontal eaves where guttering is required to follow both. The junction involves changes in two directions calling for a special transition corner piece to allow the gutter to remain upright throughout the Further design

transition. This process is effected with two mitres

flexibility is offered by

although a neater solution is the single-mitre corner

means of special

which entails an adaption to the gutter profile on

fabrication techniques,

the raking section called a compound gutter

not least of which can cover the fabrication of purpose-made gutter

welded & mitred connections

CURVED GUTTERING Guttering for a curved application may be either facetted in short

junctions, faceted

lengths with regular

lengths and integral

welded or site-

embellishments.

assembled joints or a true curve can be fabricated. For a cast gutter a special curved pattern is made to the COMPOUND ANGLES

required curvature, which may be already available if the radius and profile have been applied to a previous job. Foldings can be formed into a curve by making each face separately and welding the lengths together. Aluminium extrusions are put through a special rolling process which bends straight

FACETTED AND TRUE-CURVE GUTTERING

lengths into curved lengths.

SPECIAL FITTINGS Virtually any special kind of gutter component or junction can be made to order.

A GUTTER MOVEMENT JOINT

AN EXTENDED INTERNAL CORNER

EMBELLISHMENTS A variety of cast figures and emblems is available for including in rainwater assemblies which can add a distinctive touch to any project. A purpose-made embellishment is a cost effective way of enhancing a standard system.

R

ainwater pipes are fixed by either pipe clips, cast eared sockets or by direct fixing. Direct fixing, which applies only to

pipe profiles with flat backs, incorporates an internal spigot which covers the fixings of the previously-installed length. The system gives a flush appearance and by its nature is resistant to vandalism by preventing climbing. Rainwater pipe brackets, commonly known as pipe clips, are Methods of fixing

folded from bar to profile or may be extruded to a

rainwater pipe vary

standard design. Folded brackets provide

depending on the

adjustability to suit fixing at varying offsets from the

profile, style and

wall. Traditional cast sockets have ears cast

application of the

integrally for fixing which determine the offset from

system.

the wall. Increasing the offset is achieved with spacers behind the sockets or by using plain sockets secured with extension brackets.

CAST EARED SOCKET The size and shape of the pipe determines the design of the socket. Pipe lengths need to be kept to a maximum of 2 metres.

BRACKETS

DIRECT FIXING Direct fixing through the back face of the pipe allows for snug fitting against the wall face.

Extension brackets are adjustable insitu to the required offset. Brackets are normally formed from the same material as the pipework to ensure compatibility of strength and appearance.

JOINTING The selected joint system depends very much on the fixing method used and vice versa. The other functional consideration is the degree of sealing required, if any. It is normally considered acceptable that external downpipes are unsealed as long as no water escapes from the joints at the designed maximum flow rate, that is, the rate at which the guttering does not overflow.

SWAGED SPIGOTS A swaged spigot is a manipulation at the end of a pipe length. It is generally the most economical jointing method since it uses no further material. Swaged piping always requires brackets for fixing but this has the advantage that lengths are not restricted to 2 metres.

FLEXIBLE RUBBER JOINT CAST SOCKETS This is the traditional method of jointing pipes. Originally, sockets were formed on the end of cast pipes. With modern extruded aluminium pipes, the sockets are cast separately and fixed to the ends of pipes and fittings. Cast sockets are only available in certain patterns for certain sizes of pipe.

This joint comprises a neoprene rubber coupling used in conjunction with plain ended pipes. Mechanical restraint on the coupling, usually using Jubilee type clips, ensures that pipework can be aligned and movement taken up. The fittings are not decorative and are therefore used only internally such as in service ducts.

A

ll standard round rainwater pipes are extruded aluminium jointed with either swaged or cast sockets or with flexible

rubber couplings. Fixing can be by either cast eared socket, welded cleat or folded bracket.

Round rainwater pipe is the most common and traditional basic inherently strong.

FIXING & JOINTING

Modern day building

Cast iron rainwater

demands a greater

pipe has cast sockets

choice in design

for jointing which have

extending to the

been invariably eared

increasing use of

for fixing. Most other

square or angular

metals are used with

shape, being

pipework as well as greater choice of the

swaged sockets or offsets fabricated to order

fabricated spigots in

round form.

conjunction with a choice of jointing method and fixing

separate brackets. Aluminium piping is offered with a choice of

PIPE SHOES

pipe terminations to order

Matching pipe shoes are supplied with either integral eared sockets or uneared sockets for use with separate fixing brackets.

all these jointing methods. Brackets are available in standard one-part, two-part and extendable patterns. Round aluminium downpipes with sealed rubber joints may need suspension hangers which are designed and supplied to order.

ROUND PIPEWORK This is the most common profile which is traditionally easy to cast, is structurally strong and aligns itself in all planes. All standard round rainwater pipes are aluminium with a choice of jointing system.

RD 25 63 mm diameter RD 30 75 mm diameter RD 40 100 mm diameter extruded aluminium - cast socket joints eared fixing sockets or extruded brackets

RF 25 63 mm diameter RF 30 75 mm diameter RF 40 100 mm diameter RF 60 150 mm diameter extruded aluminium - swaged/welded spigot joints - extruded brackets

SQUARE PIPEWORK The square range of downpipes, which includes rectangular profiles, is regarded as traditionally formal and impressive. Apart from styling, they may be selected for their anticlimb characteristics or for hydraulic capacity which is greater than that of circular pipe of equivalent dimensions.

SD 33 75 x 75 mm SD 43 100 x 75 mm SD 44 100 x 100 mm extruded aluminium - cast socket joints eared fixing sockets or folded brackets

SF 33 75 x 75 mm SF 43 100 x 75 mm SF 44 100 x 100 mm SF 66 150 x 150 mm extruded aluminium - welded spigots - direct fix / folded brackets

S

ecurity rainwater pipes fit flush to the wall surface, eliminating any chance of gripping or climbing the pipework and therefore

deterring vandalism. The pipework is strong, durable and attractive with uncluttered lines. There are no projecting collars and fixings are concealed.

A system of flush fitting rainwater

FIXING & JOINTING

pipework designed to meet the growing downward assembly

demand for secure

The system utilises

high quality

simple bar fixing cleats

downpipes.

which engage an concealed cleat fixing engages with rear channels

extruded channel profile at the rear face. The cleats are directly fixed to the wall face

integrated concealed sleeve

allowing complete assemblies to be secured flush to the wall, each section of pipe being connected by integrated internal

extruded aluminium profiles

sleeves. Fixings and joints are concealed. The system is

extrusion channel suitable for lightning conductor tape

assembled from eaves level downward and can be used in conjunction with Kyrarch guttering or

DESIGN FEATURES

other compatible gutters.

PROFILES

SQUARE

SW 33 75 x 75 mm SW 44 100 x 100 mm

RECTANGULAR

SW 43 100 x 75 mm

OCTAGONAL

OW 44 100 x 100 mm

TRIANGULAR

TW 50 125 x 108 mm

SEMI-CIRCULAR

RW 30 75 x 75 mm RW 40 100 x 100 mm

PIPE VARIATIONS Although downpipes can be fabricated to various patterns, they are usually installed squarely to the plane of the wall. A novel departure from this norm In addition to the

is the use of oblique fixing whereby square pipe is

general assembly of

installed at an angle to the wall using special

pipe and gutter

brackets. All standard fittings can be adapted to

installations, purpose

suit although direct fix or cast eared sockets are

made components

obviously not applicable.

are often required or introduced to embellish, enhance or

RAIN CHAIN

add individuality to projects.

This is a very old method of conveying rainwater down to ground level. It is still used occasionally , mostly for visual effect since it does lend itself to interesting architectural expression. A stainless stout aluminium or stainless steel chain attached to a funnel outlet in the gutter and tethered at its base

steel or aluminium chain under tension is used as a path for the water to cascade down. The idea enjoys a resurgence of interest from time to

A RAIN CHAIN ASSEMBLY

time although the possibility of misuse and the effects of spray in blustery conditions need to be taken into account.

EMBELLISHMENTS A variety of cast figures is available for adding to sockets, hoppers and the like.

purpose-made cast hopper with emblem or date embellishment

individually designed cast rodding access cover plate

PIPE EMBELLISHMENT

T Kyrarch offers a range of rainwater outlets for flat roof installations. These are high quality specialised castings designed to overcome the problems of leakage and flow restriction at the critical junction between the roof membrane and the outgoing pipework.

he outlets are cast from aluminium with all fixings in stainless steel. The castings are polyester powder coated, normally in a distinctive green and red although other colours can be applied. Where used in conjunction with lead or copper roofing, or roofs collecting water run-off from lead or copper-clad areas, then a gunmetal alloy is used in place of aluminium to prevent electrolytic corrosion. Foamed insulation may be applied to the outlet body for integration with warm-roof construction.

stainless steel bolted connections

FIXING & JOINTING

domical or flat grate bolted to clamping ring

The outlet designs vary in shape and size but all follow the same basic configuration. The body which forms the sump, is secured to the structural deck and the waterproof membrane is dressed into it. The clamping ring is bolted down to the body which mechanically compresses and restrains the roof membrane. The grate, which is either domical or, for trafficked areas, flat is bolted in turn to the clamping ring.

clamping ring

cast body

OUTLET CONSTRUCTION

The Gulley Outlet is designed for use in formed drainage channels where a restricted channel width may preclude the use of larger outlets.

For general use, outlets are available with spigots or screw threads positioned 0 0 vertically, at 45 or at 90 to the roof deck. For parapet installations the threaded two-way outlet should be used. The gulley outlet is appropriate for narrow valley gutters and the balcony outlet is designed to be installed against a wall. Balcony and two-way outlets have flat grates only. All other outlets are supplied with a domical grate as standard. Certain types of pipework can be connected directly to the outlet spigot while others require a coupling. Alternatively an outlet with a screwthread connector may be supplied which may then be fitted with an adaptor to provide a spigot. Extension rings are available to raise gratings to a higher level to suit ‘inverted warm-roof’ constructions.

The Two-Way Outlet is designed to fit into the angle formed by the intersection of vertical and horizontal surfaces, most notably at the junction of a balcony and parapet. The outlet has a threaded connection and can be installed with either horizontal or vertical connections.

VERTICAL OUTLET . SPIGOTED 50mm 50/VS 75mm 75/VS 100mm 100/VS 150mm 150/VS

THREADED

50/VT 75/VT 100/VT 150/VT

0

90 OUTLET . 50mm 75mm 100mm

SPIGOTED

50/90S 75/90S 100/90S

THREADED

50/90T 75/90T 100/90T

0

45 OUTLET . 50mm 75mm 100mm

SPIGOTED

50/45S 75/45S 100/45S

THREADED

50/45T 75/45T 100/45T

BALCONY OUTLET . 50mm 75mm 100mm

SPIGOTED ONLY

50/BO 75/BO 100/BO

GULLEY OUTLET . SPIGOTED ONLY 75mm 75/GOS 100mm 100/GOS

TWO-WAY OUTLET . THREADED ONLY 50mm 50/TW 75mm 75/TW

York House North Bridge Road Berkhamsted HP4 1TA 01442 860400