● Fixed Louvre Screens 50/75/100

● Adjustable Ellipsoid Blades 200/300

● Fixed Ellipsoid Blades 100/200/300/400

May 2010 Sunscreens Brise Soleil

May 2010C1/SfB Xh4(31.8)

SunscreensBrise Soleil

Louvres Sunscreens Natural Ventilators

Ruskin Air Management Limitedwww.ruskinuk.co.uk

Sunscreens Brise Soleil

IntroductionThe use of sunscreens to reducesolar heat gain through glazing isrecognised as an importantconsideration in modernbuildings.

In Northern latitudes such as theUK, the sun's altitude is lower,resulting in more exposure forvertical glazing to heat gains.

With increasing emphasis oncontrolled internal environmentsand the need for reduced energyconsumption, planning for solargains is necessary even in airconditioned buildings.

Besides being very practical,sunscreens also provide thedesigner with additional creativeopportunities.

Screen typeSunscreens are produced in arange of 'louvred' blades or inellipsoid blade styles. Ellipsoidblades may be used in vertical orhorizontal form and can beadjustable.

MaterialAll sunscreen blades arealuminium. Framework or sideplates are also in aluminium,while wall brackets, brace armsand support arms are normally insteel or stainless steel.

FinishesAluminium profiles are available innatural anodised or polyesterpowder coat. Steel is plated andpolyester powder coat finished.Stainless steel is self colour.

Fixing methodsSimple screens may be fixed tostructure via wall brackets andbrace arms. Larger / heavierscreens can be fitted via supportarms or direct to structure.

Screens may be fitted to curtainwall systems by the use of ourspecial brackets. However, thesuitability of the curtain wallprofile to carry the imposed loadsmust be confirmed.

Centres of wall brackets /support arms depends on screentype, span and design wind load.

Sunscreens above windows The length and width ofprojection of a screen dependson a number of variable factorsamong which are time of yearand time of day.

For south facing elevations inthe UK the highest sun altitudeoccurs at mid day. The sunaltitude rises during the monthsof April and May, peaking atJune, then declining through toSeptember.

The east-west sun path alsomeans that for optimumshading a sunscreen should bewider than the window inquestion.

However providing optimumshading for all occasions basedsolely on sun position would beincorrect. Shading requirementsshould be considered (by therelevant consultant) inconjunction with the type ofglazing, building structure, typeof sky (cloudy / clear) etc.

Sun altitude at 52º latitudeat 12 noon

March 38ºMay 58ºJune 62ºAug 50ºSept 38ºDec 15º

Sun altitude at 55º latitude at 12 noon

March 35ºMay 55ºJune 58ºAug 47ºSept 35ºDec 12º

South facing sunscreens should behorizontal, either projecting from thehead of the window or horizontalplaced in front of the window.

Screens facing east or west shouldbe vertical (moveable).

North

West

East

South

North

West

East

South

Sunscreens / Brise Soleil

2 www.naco.co.uk

Sunscreens Brise Soleil

Altitude is the angle up from thehorizon.Azimuth is the angle along thehorizon, with zero degreescorresponding to north andincreasing in a clockwise fashion.

Sunscreen ‘depth’ and ‘width’.

Depth = height

tan VSA

Width = depth x tan HSA

Width is the size that the screenshould project beyond thewindow jamb for maximum sunscreening.

Shadow AnglesWhen shading a window, theabsolute azimuth and altitude ofthe sun are not as important asthe horizontal and verticalshadow angles relative to theorientation of a specific surface.

The Horizontal Shadow Angle(HSA) is the angle between theorientation of a surface and thesolar azimuth.

The Vertical Shadow Angle (VSA)is the angle formed by a virtualplane between the bottom lefthand and right hand corners ofthe window and the sun.

HSA and VSA are measured inthe sense NESW. North beingzero degrees, east being 90degrees.

Sunscreen blade angle andpitchBlade spacing must cater for thehigh point of the sun in June andfor the low point - normallyconsidered to be September(while in winter months the sun islower it is also weaker due togeneral daylight conditions).

a : solar altitudee : solar azimuth

N

E

Se

aW

ALT

VSA

HSA

Alt

Alt

W

W

La

La

P

P

P = w (cosLa tanAlt + sinLa)V = w cosLa tanAlt

V

P = w (cosLa + atanAlt sinLa)

Depth

Width

Height

Solar Altitude and Azimuth

3www.naco.co.uk

Sunscreens Brise Soleil

SizesFixed blades are available in 100,200, 300, and 400 mm styles.

Blade spanThe span (length) of blades doesdepend on design loads (seeblade length guide).

FixingsThe small 100 mm and the 200mm blades would normally beassembled on to side plates(ladder construction), forconnection to support arms.

Blades types 200 and 300 can befitted as per the adjustable bladedetails but with the link rodlocked in the required position.This arrangement caters forexpansion / contraction of blades.

The large 400 blades wouldgenerally be fitted direct tostructure utilising our specialexpansion bracket fittings.

End capsProfiled end caps are fitted toblades with expansion fixingarrangements.

For shorter blade spans, endcaps may be used for fixing tosupport arms / structure.

Support armwith baseplate

Fixing to steel / concrete

Fixing to brick work

Fixing through cladding to structureStub arm fixed prior to cladding

Support armwith baseplate

Support armwith baseplate

Blade fixed to side plates

Blade fixed to side plates

Blade fixed to side plates

Wall bracket

Brace arm (optional)

Ellipsoid fixed blades

4 www.naco.co.uk

Sunscreens Brise Soleil

GeneralAdjustable blades have support /pivot axles housed in analuminium channel frame - topand bottom for verticalapplications and each side forhorizontal. A link rod joins eachsunbreaker blade to ensureuniform movement.

Control of adjustable units is byelectric actuator fitted to theconnection rod.

RotationBlade rotation is clockwise.

SizesBlades are available in 200 mmand 300 mm profiles produced inmodular sizes with 'non standard'lengths being catered for byclosure angles.

Blade SpanThe span (length) of blades doesdepend on design loads.Recommended spans are givenfor each blade type.

End capsProfiled end caps are fitted toellipsoid blades.

Link rodsAluminium channel with stainlesssteel pins.

ConnectorFlat bar for joining link rodson larger screens.

Head / cill or side framesExtruded aluminium channel.

AxlesStainless steel:Axles have nylon pivot bushes.Head and side axles are fittedwith centralising collar.

Electric operation24 volt motors can be supplied.These are fitted with an additionalprotective cover.

Technical performanceThe axle mechanism has beensubject to a 50 000 cycle weartest with no deterioration ofcomponent parts.

Pivot axles and channel framehave had static load test of 150kg (1.5 KN) applied to each axlefor a period of 20 mins withoutpermanent distortion to axle orframe.

Ellipsoid blades have beensubjected to uniformly distributedload tests to establish bladelength and acceptable deflection.

Ellipsoid adjustable blades

5www.naco.co.uk

Sunscreens Brise Soleil

6 www.naco.co.uk

Sunscreens Brise Soleil

Sunscreens may be fitted to various types of curtain wallmullions.

These details show the mostcommon form of fixing sunscreensupport arms. The holes requiredin the mullion would normally befactory drilled for accuracy.

Where long blade spans or largerprojecting screens are required,brace arms may be needed todistribute loads over the mullion.

For these screen applications, thecurtain wall supplier must confirmthe suitability of their systemprofile to carry the imposed loads.

The depth of screen arms isdetermined by screen projection,span and imposed loads (wind /snow / self weight), as is thenumber and size of fixing pins.

Stainless steel pins

Stainless steel pins

Section milled out to pass arm

Stainless steelbracket

Screen arm

Screen arm

Blade end capsbolted to arm

Sunscreens fixing to curtain wall mullions

7www.naco.co.uk

Sunscreens Brise Soleil

SizesLouvred screens are producedfrom our 50, 75 or 100 bladeprofiles.

Framed screensThese are light weight simplescreens of short projection andlimited span.

They are fitted to structure viawall brackets and have brace armsupports.

Ladder screensScreens with greater projection orlonger span between supportscan be produced in thisconstruction. Also used wherebrace arms are not desired.

A 75 mm diameter tube facia isavailable for ladder screens.

Simple brace bars are fitted toblades where required. Wherefacia tubes are used the ‘brace’will be a rod / spacer.

Vertical screensThese will generally follow thesame format as above.

Support armwith baseplate

Tube 'fascia'

Support armwith baseplate

Brace Bar

Standard LadderScreen

Vertical Screen

Framed Screens

Wall bracket

Brace Arm

Support Armwith baseplate

Special ladder for usewith facia tube androd/spacer

Rod /spacer

Louvre fixed blade screens

8 www.naco.co.uk

Sunscreens Brise Soleil

Maximum length between supportarms based on 1200 n/m2 windload is 3000 mm.

Screens with a projection of up to1000 mm will have 3.52 mm x152 mm extruded aluminium sideplates.

Screens projecting 1050 mm upto 1200 mm will have 6.35 mm x152 mm extruded aluminium sideplates.

150 S S

Projection

S S E

1

Projection No. of blades Spacing (S) End Dim (E)

600 3 200 50

650 3 * 190 40

700 4 175 25

750 4 185 45

800 4 200 50

850 4 * 190 50

900 5 190 50

950 5 190 40

1000 5 200 50

1050 5 * 195 40

1100 6 180 50

1150 6 190 50

1200 6 200 50

Projection No. of blades Spacing (S) End Dim (E)

600 5 90 46

650 5 100 56

700 6 90 56

750 6 100 56

800 7 90 66

850 7 100 56

900 8 95 41

950 8 100 56

1000 9 95 46

1050 9 100 56

1100 10 95 51

1150 10 100 56

1200 11 95 56

Standard ladder sunscreenswith type 75AB blades

Maximum length between supportarms based on 1200 n/m2 windload is 2400 mm.

Screens with a projection of up to1000 mm will have 3.52 mm x102 mm extruded aluminium sideplates.

Screens projecting 1050 mm upto 1200 mm will have 4.76 mm x152 mm extruded aluminium sideplates.

Brace bars

Frame length mm No. ofbrace bars

Up to 1000 mm -

1001 to 2000 mm 1

2001 to 2400 mm 2

* fitted with facia tube

Standard ellipsoid sunscreenswith 200 blades

9www.naco.co.uk

Projection

142 S 52 ES S S

Sunscreens Brise Soleil

Introduction

A simple pleasing design forfitting to curtainwall and windowsystems.

Screen TypeF type screens are fixed andwould generally be used inconjunction with inward openingwindows.

H type screens are hinged toenable cleaning of fixed windowand curtainwall systems fromthe outside.

Material / Construction50 mm diameter tubularextruded aluminium head rail,fitted to aluminium mountingbrackets with stainless steelaxles.

Ellipsoid cill rail 100 mm x 10 mm extrudedaluminium.

Screen blades and spacer tubesfrom extruded aluminium.

Screens are ‘locked’ with 8 mmdiameter stainless steel corerods. Rods are 150 mm fromeach end and at 1200 mmmaximum centres.

Hinged screens have aluminiumsupport arms for use when thescreen is required to be held‘open’.

Hinged screens are secured toa cill mounting bracket by lever‘bolts’.

Fixed screens are fitted to thecill mounting bracket bystainless steel pins.

FinishesAvailable in polyester powdercoat and anodised finishes.

45

Extruded Aluminium75mm dia head

Mounting bracketplates at mullion centres

Stainless steel support rods

Aluminium spacer tube

90

F/H Sunscreens

10 www.naco.co.uk

3245

50 60

85

Type 100

Type 200S

Type 300S Type 300

Type 400

Sunscreens Brise Soleil

50S Blade 75S Blade 75AB Blade

100S Blade

75S special ladder screen willspan 2400 mm with 1200 mmprojection at 1200 n/m2 windload.

Spans are based on blades being at a 45 degree angle.

This table is for guidance. Each project should be confirmed with our design office.

Ellipsoid blades

Louvre blades

600 1950 3850 4200 6000

900 1750 3550 3850 5700

1200 1600 3350 3600 5400

1350 1550 3250 3500 5300

1500 1500 3150 3400 5200

1700 1450 3050 3300 5000

2000 1400 2950 3200 5000

Deflection L/150 Deflection L/175 Deflection L /200or max 25 mm

Type 100 200S 300S 400

Windload n/m2 Span mm

Ellipsoid blade span guide

11www.naco.co.uk

© Ruskin Air Manag

ement Limited 20

10 LS10

217 (5.10)

Sunscreens Brise Soleil

Ruskin Air Management Limitedis a BS EN ISO 9000 registeredcompany.

The statements made in this brochure or by ourrepresentatives in consequence of any enquiriesarising out of this document are given for informationpurposes only. They are not intended to have anylegal effect and the company is not to be regardedas bound thereby. The company will only acceptobligations which are expressly negotiated for andagreed and incorporated into a written agreementmade with its customers.

Due to a policy of continuous product developmentthe specification and details contained herein aresubject to alteration without prior notice.

Comprehensive and detailed informationis available for all Naco products. Visitour website at www.naco.co.uk

10 Grange Road, Houstoun Industrial EstateLivingston West Lothian, EH54 5DETel: +44 (0)1506 438083Fax: +44 (0)1506 433441Email: sales@hasl.co.ukWebsite: www.hasl.co.uk

Distributor for Scotland

Stourbridge Road, BridgnorthShropshire, WV15 5BBTel:01746 761921Fax: 01746 766450Email: sales@naco.co.ukWebsite: www.naco.co.uk

Ruskin Air Management Limited