Wednesday, January 31, 2007

Coordinates and wind speed

To find out the average wind speed for my site I followed Mark Brinkley's advice and went to the DTI site, they directed me off to streetmap.co.uk where I got my various values:



then you follow the instrctions on the dti page (you have to read the small print) and they then gave me this:



A bit more reading and it seems Porty is pretty average for the UK - i.e. bad. An average wind speed of 5m/s at 10m about ground level. According to Nathan Briggs, a consultant to windsave who produce domestic wind turbines, in a comment from Mark Brinley's blog:

Firstly I'm glad we didn't try to fit a windmill and I hope you see the sense that we didn't. With just 5.1m/s I doubt you would have seen anything close to 1000kWh per annum so payback would have been terrible anyway.

The Green Building Forum offers some definitive advice on the subject, which in summary is its not worth it unless you are in a windy site, and even then don't believe the hype.

Shipping container dimensions and cost



We are considering where to live wheile the house is being built. The shipping container route doesn't look that promising.

They appear to go for around 1,000pounds on ebay but it's hard to find a 30' container which is my ideal dimension. Then there is a tonne of work to make it habitable.

All about paint

All about paint

Biff Vernon - the window guy

Biff Vernon is great. He contributes his wealth of experience on windows and doors at the green building forum he also maintain his own site and makes some beautiful windows in solid oak.





I am going to ask for a quote for my windows but am not sure if I can afford him, I guess no is the answer as I can't afford anything much...

Window cost summary

Attached is a summary of potential total window costs. The figures in red are list price from velux. In blue are prime cost sums for the sliding doors and front door (no quote available as yet). Also there is a cost per sqm figure which is interesting.

Green Building Store window quotations

I sent off my window schedule to Green Building Store on 11th January and got my quotation back today 30th January. I was impressed by them keeping me up-to-date with e-mails and turning around what was quite a complex order ina few weeks.

The quote makes interesting reading (pages 1-7) I'll post more once I have fully digested it.















The total ex vat is 8,691.94. An additional 5,110.60 for installation if required.

Monday, January 29, 2007

FED EX story caption

"The concept is interesting and well-formed, but in order to earn better than a ‘C’, the idea must be feasible."
- A Yale University management professor, in response to student Fred Smith’s paper proposing reliable overnight delivery service (Smith went on to found Federal Express)

Wednesday, January 24, 2007

change to garden elevation

I've revised the design to the garden elevation. Finally managed to believe that I don't need a column in the middle of the windows (this is an aesthetic thing rather than structural).

So I can have 2 large sliding doors that totally slide out of the way to open up the living room to the garden.





Behind are 8 sliding shoji screens (not shown) which can also slide out of the way, I have altered the stair configuration to leave 800mmx350mm space to stack up the shoji when not in use.
Two quotes that I would like to try to remember. Both by Charles Kettering:

"Believe and act as if it were impossible to fail"

"The only time you can afford to fail is the last time you try"

Thursday, January 11, 2007

Edinburgh planning online

Well, my application is in and online (gives me butterflies)
application number 07/00099/FUL
link to Planning Online page here

window schedule

This is my window schedule:



20 windows (inlcluding sliding doors to garden) and one door totall area of 49sqm.

I've sent this for costing by Green Building Store who look like they provide some good quality and sustianable windows.

low impact planning theory

A very interesting semi-rant by Tony Wrench who is "continually baffled by the obstacles that prevent me simply doing what my grandfather did - build a wooden house in the countryside. " I am baffled by the same thing.

"Homelessness and social deprivation

100,000 thousand families are homeless or in 'temporary accommodation'. This is twice the number of twelve years ago, despite all the economic progress governments claim to have made. Millions are living out a half-life in decaying inner cities, and millions more are trapped in estates on the edges of the towns and cities of Britain, many without hope of anything worthwhile to do; without land on which to grow food; without space for their families to grow up nearby; and without contact with nature or their natural heritage. They live in rectangular boxes designed by another class for another generation, planned by public officials they have never met. The TV programmes that are watched for 5 hours a day on average (what else is there to do?), videos and films, all offer largely some form of escapism. This 'underclass' is so numerous that controlling it is now the government's greatest worry. Thousands are criminalised and packed into our antiquated prisons. Only Turkey, of the European states, exceeds Britain's rates of prison population, which has risen from 40,000 to over 74,000 in the last twelve years. Most of the 'underclass', however, stay where they are, needing more and more billions of DSS and 'Law 'n' Order' budgets to be spent containing them in the deteriorating homes they already have. Why the big fuss about asylum seekers? Because the way of life of the poorest 20% of the population already here is so lousy that there is simply no more space within the system to allow more poor people in."

The full article avaialble here along with a woodland roundhouse.

This reminds me of the oft quoted statistic that the poorest 50% of the US population earn less combined than Bill Gates.

And the authors sugegsted change to the planning system:

"Imagine a new category of land use - Permaculture Land (Pc Land). This is land used for permaculture - sustainable self-reliant agriculture and horticulture in which work, house building, leisure, growing food, rearing animals, education, renewable energy, recycling and nature conservation are integrated in an infinite number of ways. The essence of Pc Land would be that there is a contractual relationship between the owner and the local/national authorities. This states, basically:
'I will buy and live on just this piece of land.
I will not buy several plots and speculate.
I will not let it out.
I will conserve energy and nature in line with a permaculture design.
I will plant over 20 trees per acre.
I will co-operate with my neighbours over transport, infrastructure, power generation, waste disposal, water harvesting and supply, and common land.
In return for the freedom to build my own house in the style I choose I will do without additional connections to mains water, electricity, sewerage or road systems.'

Planning authorities would be given the power to designate any area Pc Land, whether it was previously industrial, agricultural, military or even residential land. Conditions would be put on the number of dwellings per acre (maybe a maximum of two), roads and vehicles, and a height limit of structures appropriate to the site - say 10 metres. Authorities would be encouraged to designate areas of several square miles, or large zones of Pc Land. These could be areas currently suffering the effects of monoculture, depopulation, inadequate housing or chronic unemployment. Disused military bases could be designated Pc Land. Any farmer or landholder could apply to change from agricultural land to Pc Land, and there would be a presumption in favour of acceptance.

The consequences of this small change to planning law would of course be enormous, and I invite you to use your imagination with me...."



The survey

My sister and brother are going to do a site survey. My sister is an architect and my brother a man of leisure with degrees in both engineering and architecture so this is not beyond their wit...

Here is what I am going to ask them to do.

1. A full measured survey of the existing site and buildings (with photographs as required - to explain junctions etc). This should be to enough detail that we can build with confidence from it - order a timber frame to exact dimensions etc - accuracy to 2mm.


2. Two ground condition trial pits with photographs. These should be at least 1m deep, outside of the location of the proposed foundations, one should be near the tree to check for how extensive the root ball is and to assess the potential for foundation disturbance. The other one should be somewhere else on the site. Look for and photgraph, soil type (sand or clay or gravel etc - my guess and hope is sandy gravel as its near the beach). Also note any other 'things' in the ground that may effect construction; rock, toxins (chemical leaks etc), artefacts, big holes, pipes, etc.

3. A heights survey of the land and surrounding roads. This will be used to assess drainage and foundation heights. It should be accurate to about 10mm. see following steps for more detail:




















Theodolite and surveys

A theodolite is an instrument for measuring both horizontal and vertical angles, as used in triangulation networks. It is a key tool in surveying and engineering work. wikipedia

Starting from a benchmark, a position with known location and elevation, the distance and angles to the unknown point are measured. wikipedia

The theodolite is the standard tool of optical survey. It is a small tripod-mounted high precision telescope with a total system magnification of 15x-60x and an array of dials, knobs, levels, and auxiliary lens systems, with which extremely high precision measurements of horizontal ("azimuth'') and vertical ("altitude'') angles are made. Usable resolution of 15 arc seconds (12 parts per million) is common.



One person works the theodolyte (A), the other is assitant (B). B holds vertically at two vertices a pole that must be at least as high as the theodolite's lens and have a perpendicular bubble level (or use a level held against the pole). The pole must be ruled to correspond to the height of the theodolite lens - be clearly readable through the theodolite's eyepiece. Measure the baseline distance between the pole and the theodlyte using a measuring tape.

Now measure the height

Move the pole, place and level the theodolite over it, and use the theodolite's optical plummet or, in its absence, a dangling weight, to center on the hole. Now do the same again to a new point.

Here is a flash animation explaing how to use the theodlyte for measuring angles. To measure heights just measure off the pole...

Wednesday, January 10, 2007

sliding or sliding-folding doors

That is the question. Whether it is nobler in the mind to have big doors that slide right out of the way or little ones that fold and slide and can be opened separately. There are advantages and disadvantges to both...



The thing I don't like about sliding-folding is the look of the hinges between the doors and the thickness of the opened doors (80mm x number of leaves).




but it can look good with big wide panes.



And this floor: polished concrete looking fantastic.

All images from solarlux

Planning application has gone in

The application for planning for the house was hand delivered on Monday 8th January (by my sister). Now its wait and see. I'm glad its all over, that part at least. Here are the south elevation, section and perspective view to show some of the design changes.


south eleavtion

section




view from south west