A wobbly table on the non-flat surface of the reality

The faster trees grow, the straighter they tend to be. Compare the straight spears of fast-growing bamboo with the twisting boughs of old oak in ancient woodland. The former grows quickly skyward in a single season, whereas the latter slowly develops, year on year. 

In the twists and turns of an old tree’s branches we see captured in its geometry the changing environmental conditions it has experienced — the availability of light, direction of wind and even how much water it had to drink. A partner dance fixed in its branches. 

This is construction of a sort that responds to the changing conditions. That adapts. That is the best structural response to what happened next.

The shapes we find in the living world are built up on site, layer by layer, ring by ring, branch by branch. Each a best-fit response to what happened that season.

Engineers don’t grow things. Not in this sense of contextual layering up and extending. 

Instead, we cast, extrude and slice. It’s easier to design and cut things in straight lines, cast flat shapes, pack things that are regular cuboids and transport things that all look the same. 

Whereas the living world evolves shapes to suit the site, we’ve evolved our designs to suit the factory, the quarry, the motorway and the drawing board. We make in one place and take it to another. Ready-baked forms with few of the specificities of place built in. 

More fundamentally, the living world designs in context and engineers tend to design in the abstract. 

Abstraction is helpful! It makes things simpler, easier to calculate, define, arrange, and scale up. But it also separates us from context and the consequences of our decisions. 

Given nothing in the landscape, nor in the living world is straight, everything we make straight is an imperfect fit, an inefficient response.

A wobbly table on the non-flat surface of the reality.

Straight lines are sign that things have been done to a place. That variations have been ignored or cut off. That something has been abstracted and rendered easier — but at what cost? What has been flattened? What has been undervalued? What has been overlooked?

Nature does so much so little. And we can learn to do the same. But this asks more of designers. 

Design that layers.

Design that experiments on site.

Design that is a long-term response to place. 

I believe we would recognise this kind of design straight away. And we would find it intrinsically beautiful.

The circumference of a circle of infinite radius

I rounded off last week’s posts with a number of questions for investigating systems in the living world. Answering these questions can help us develop a palette of systemic design principles that can help engineers (and other humans) create thriving with limited resources. The living world does it so well, and we might rely on it for our survival as a species, it is worth spending some time on it.

My first question, why is that the shape it is? 

Sitting where I am, I can see a lot of straight lines. The awning above the cafe, the tiles of the floor, the lamp posts, the window frames, the balconies, the scaffolding, the road leading into the distance.

A straight line is the shortest distance between two points. 

A mathematician once told me that a straight line is the circumference of a circle of infinite radius. That one has caused lots of debates in the pub. 

The path of a beam of light (unless there’s a particularly heavy star in the vicinity).

To this list of definitions of a straight line, we might add ‘a shape made by engineers (and other humans) in their manipulation of the physical world’. 

Whether by scoring into, connecting together, extruding from our driving through the substrate of the earth and its derivative materials, we tend to make a lot of straight lines. 

There are straight lines in the living world, but you have to search for them. A spider’s web is straight line between the nodes of its structure, until the wind blows. At a microscopic level, crystaline structures contain straight lines, and occasionally these are translated to the macro scale, as in the basalt extrusions of the Giant’s Causeway. 

Visitor’s from another planet would easily be able to spot the systems on planet earth where humans have been the chief engineers by the abundance of straight lines. 

Unlocking thinking – try out all the colours in your palette

This week I’ve been writing about how artists, engineers (and other humans) build up a professional palette of techniques and forms from which they can develop new ideas. These are the colours they paint with

Having assembled our paint set, this palette lends itself well to a reliable technique for unlocking thinking. 

What people tell me time and again in workshops is that it isn’t having the first idea that they struggle with. It’s coming up with the second. Or having a new idea when the first one gets rejected. That’s when thinking becomes blocked. (There’s reasons for this blocking, which we can explore in another post).

That’s when I suggest systematically using the colours in your palette. 

If we were using a real paint palette, it would simply involve doing a quick sketch with the red paint, then the orange, then the blue, say. A quick doodle to see what the thing could look like in each of these colours.

For a structural engineer designing a span: what would this look like if it were a simple beam?

A cantilever? 

An arch?

A truss? 

Or what would the structure look like made from stone?

Timber?

Concrete?

Steel?

Each material and form has its own affordances — what you can and can’t do with it. 

If you know your colours, the cognitive load of doing five two-minute sketches is low. And that small effort can unlock the second idea. And it allows you to see your first idea in context — as the first in a family of possibilities. 

Structural poems

We’re going on a bear hunt

I’m not scared, etc.*

Oh no — a gap.

We can’t go around it.

We can’t go under it.

We’ll have to…

Build a simply supported beam,

Or a continuous span,

An arch,

A suspension bridge,

A cable-stayed structure,

A cantilever,

A propped cantilever,

A truss…

Not as poetic as Michael Rosen’s version, but it serves to illustrate one of the palettes of the structural engineer: structural form.

And there are other palettes too…

Concrete, steel, timber, masonry, stone, glass, composites, straw bales — just some of the colours in the material palette.

Footings, rafts, deep piles, mini piles, caissons — the foundation palette.

These are some of the colours from which structural engineers paint their ideas.

Some of the vocabulary from which they write their poems of structural form.

The wider the vocabulary, the more options for the poet.

*From We’re Going on a Bear Hunt by Michael Rosen.