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t as

a de

sign

tool

Hea

ther

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anTe

chno

logy

IKW

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June

090

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ne 1

200

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udie

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re is

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ibra

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here

the

maj

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ooks

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loca

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For

this

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hed

to c

reat

e a

di�u

sed

ambi

ant l

evel

of l

ight

ing,

but

with

sh

arpe

r ban

ds o

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om th

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uth

to d

enot

e th

e pa

ssin

g of

tim

e th

roug

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rate

gica

lly

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ed a

nd c

ontr

olle

d op

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gs.

The

maj

ority

of

the

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de re

ceiv

es s

outh

ern

light

(dire

ctly

fo

rwar

d in

thes

e re

nder

ings

) so

I pla

nned

to im

plem

ent s

hadi

ng in

to th

e de

sign

of t

he

open

ings

to d

i�us

e th

e lig

ht a

s it

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and

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leve

ls a

nd

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e w

ithin

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spac

e.I w

ishe

d th

e sp

ace

to h

ave

a hu

man

sca

le a

ndfe

el w

arm

as

it is

like

the

hear

t of t

he L

ibra

ry,

whe

re th

e m

ajor

ity o

f the

sur

roun

ding

life

emin

ates

from

. The

dire

ct ra

ys o

f lig

ht p

rovi

deth

is li

tera

lly b

y w

arm

ing

the

surf

aces

, be

they

obje

ct o

r peo

ple,

whi

ch th

ey fa

ll up

on. T

his

war

mth

is a

lso

achi

eved

thro

ught

he

use

oftim

ber a

cros

s th

e ce

iling

as

som

e of

the

wal

ls,

espe

cial

ly b

ecau

se it

s ho

ney

colo

ur is

acc

entu

ated

furt

her b

y th

e su

nlig

ht.

Mar

ch 0

900

Mar

ch 1

200

Mar

ch 1

600

June

160

0

Dec

embe

r 090

0D

ecem

ber 1

200

Dec

embe

r 160

0

June

120

0

Daylight AnalysisHeather OrganTechnology IKWSa2

Light meter analysisThe initial light meter render takes into account both the mezzanine level and the double height space where the mezzanine stops. In the second image, the dimensions of the light meter are reduced to eliminate the white areas. The secondset of measurements are more accurate as they are calcuated at the correct height above the �oor.

Light meter gather 1

Light meter gather 2

The two qualities of light I aimed to achieve in the space (ambient and direct) could be interpreted as scalar and directional illumination. The scalar quality of light allows surfaces to be seen, but directional light adds de�nition and depth to them. I hoped to achieve both qualities of light as I didn’t want lots of strong light rays entering the space, however without any I felt the space could become �at.

Quantitatively, the lux levels I was aiming to create were between 600 and 800 lux, along with a daylight factor of 1. This is the reccommended level for reading and to illuminate the vertical spines of book or the shelves that they are on.

The light meter analysis from the 3D model of the space estimates the light levels that would be achieved at this particular time of day, in this case 1200 June 21 2011.

For example, in the darker blue area at the front of the mezzanine there is a gain of 150 lux of direct light and 600 lux of indirect light, which gives an overall lighting level witin the reccommended values. The daylight factor in the same space was 0.77, slightly below reccommendation.

Arti�cial Light AnalysisHeather OrganTechnology IKWSa2

The arti�cial lighting aims to achieve similar lighting e�ects and atmosphereas the controlled natural light during daylight hours. The description from ERCOof these suspended lights shows they create a di�used ambient light with sharper light falling on horizontal planes:

As seen in the two light meter renderings below, the light is dispersed evenly along the line of the bookshelves. The lights are suspended along the spacebetween shelves so as it is where the most direct light is needed to read the spines of the books and possibly �ick through them.

The 3D lighting model calculations of lux levels are in excess of what they should be, however the general pattern can still be used to assess the atmosphere created.

“What makes Starpoint pendant downlights special is their matt frosted glass cover. The shimmering surface is more than just a decorative e�ect: it di�uses a small proportion of the light and results not only in bright light on the horizontal surface, but also comfortable ambient brightness. The aluminium lampholder housing has a ribbed heat sink which e�ectively dissipates the heat of the low-voltage halogen lamp. ”

The tectonics of the scheme are based in invention and tell a story of the towns history in industry. The materials and their use relate to the railway which still remains an important connection to Cardi� and the rest of Wales. For this reason, the steels I beams, which are clad in Anthra Zinc, are exposed with the rest of the structure hung from them. This also resolves the problem of cold bridges which arises when wanting a column to be exposed on both the interior and exterior, or when between a column exposed on the exterior and a beam exposed on the interior.

The beams are not only structural as they also function aesthetically to carry rainwater collected on the roofs down to the water features around the internal courtyard space. As well as this they function as a light shelf - as the construction is hung approximately 100mm below them, di�used light can be let down through glazing of the same sectional width to illuminate the bookshelves below with a softer northern quality daylight, rather than the harsher sunlight gained from the southern aspect.

The glazing is sunk into the window sill to appear seamless and allow for crisper shadows in the internal spaces.

The frame construction allows for two layers of insulation, one between the I columns and the other between the wooden studs on the interior. The damp proof membrane seals over these insulative layers to keep water out of the wall, other than in the air gap on the exterior layer. There is no vapour barrier as the wood within the walls should be allowed to breathe, and this provides a small amount of natural ventilation through controlled leakage. This decreases the likelihood of problems from condensation and reduces the service costs of the building through ventilation. The U value of the wall and the glass covered collonade on the exterior side of this wall should be su�cient to stop the lack of vapour barrier from impacting on heat retainment.

This section of building sits upon a raft foundation, however this changes in other areas of the building due to proximity to the river and presumed reduced stability of the substrate.

Heather OrganTechnology IKWSa2

Detail Section

anthra zinc clad steel I beamsDPM

douglas �r timber studs

douglas �r cladding

screed

sand

concrete

double glazing

insulation

air gap

�nish

Heather OrganTechnology IKWSa2