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MaterialsDATE 03 MAR 2026READ 8 min

Daylight is a material

How we size north lights, and why the library has nine of them.

FIG. 01 — Gantry Shed Market, SECTION A–A1:100

Author
Priya Nair
Published
03 MAR 2026
Category
Materials
Project
Gantry Shed Market

We are asked, fairly often, why a studio with good computers still begins every project with a soft pencil and a roll of thin paper. The honest answer is speed. A line on paper costs nothing, so you draw fifty of them, and the forty-nine wrong ones teach you what the right one has to do.

A sentence can leave things out. “The living room opens to the garden” sounds finished. Draw it and you have to decide how wide the opening is, what holds up the wall above it, where the step goes and which way the door swings. The drawing asks every question the sentence avoided.

The section comes first

Most people start with a plan, because a plan looks like a map and maps are familiar. We start with the section. It shows the things that make a room feel the way it does: how high the ceiling is, where the light enters, how the floor meets the ground outside.

On Gantry Shed Market the first drawing that survived was a section about the width of a hand. It showed one roof, one window and one person. Everything that came later was an argument with that sketch, and the building that stands in Halifax is still recognisably it.

“A line on paper costs nothing, so you draw fifty of them. The forty-nine wrong ones teach you what the right one has to do.”

Priya Nair, Senior architect

What a drawing has to carry

A working drawing is an instruction to someone you may never meet. It has to survive being photocopied, folded, rained on and read at arm's length on a scaffold. That is why the conventions matter:

  • What is cut is drawn heavy; what is seen beyond is drawn light.
  • Dimensions run in chains, so nobody has to add up on site.
  • Every grid line has a name, and every sheet uses the same ones.
  • Levels are given from one datum, written on the drawing.
ABCDEF1234TERRACELOBBY86.4 M²WC43.2 M²CORE60.5 M²WC43.2 M²MEETING 0260.5 M²STUDIO103.7 M²OPEN OFFICE103.7 M²STORE51.8 M²KITCHEN60.5 M²PRINT60.5 M²MEETING 0160.5 M²AAGROUND FLOOR PLAN1:1000125 MN6 0006 0008 4007 2008 40036 0007 2007 2007 20021 600
FIG. 02 — Gantry Shed Market, ground floor plan1:100

None of this is nostalgia. The same plan lives in a model on a server, and the contractor builds from that. But the model is where a decision is recorded. The pencil drawing is where it gets made.

On site

The test of a drawing is whether the building can be read the same way. Stand in the finished room with the section in your hand and you should be able to find the line you drew.

IMG. 01 — the same view, built2025

When that works, nobody notices. They just say the room feels right. We take that as the drawing doing its job.

Written by

Priya Nair

Senior architect

Copenhagen

Priya works across the studio's larger projects and coordinates its digital models. She joined after the Nine Lights competition.

Keep reading

[03]
  • Practice14 OCT 20267 min

    Drawing is how we think

    Why the section comes before the plan in our studio, and what a line can decide that a sentence cannot.

  • Process02 SEP 20265 min

    Why we still build models at 1:50

    A model is slow, expensive and impossible to email. It is also the only drawing a client reads without help.

  • Site notes21 JUL 20269 min

    Notes from the Nine Lights site

    Fourteen months of weekly site visits, written up: what went to plan, what did not, and what we would draw differently.