{"id":2827,"date":"2021-02-02T13:27:10","date_gmt":"2021-02-02T13:27:10","guid":{"rendered":"http:\/\/www.terrafirmaconsultancy.com\/landscape-architect-blog\/?p=2827"},"modified":"2022-10-20T12:34:21","modified_gmt":"2022-10-20T11:34:21","slug":"triggers-broom","status":"publish","type":"post","link":"https:\/\/www.terrafirmaconsultancy.com\/landscape-architect-blog\/triggers-broom\/","title":{"rendered":"The \u2018Trigger\u2019s Broom\u2019 philosophy"},"content":{"rendered":"<div class='booster-block booster-read-block'>\n                <div class=\"twp-read-time\">\n                \t<i class=\"booster-icon twp-clock\"><\/i> <span>Read Time:<\/span>4 Minute, 37 Second                <\/div>\n\n            <\/div>\n<p>Comments recently spotted on LinkedIn got me thinking about longevity. The original post was about the moving of a mature Pin Oak (<em>Quercus<\/em> <em>palustris<\/em>) in The Netherlands, which was written by a specialist contractor (I think; my Dutch only extends as far as double) concentrated on the action of moving the tree by a specialist arboricultural contractor. The preparation for the lift and shift took one year with extensive reduction in canopy and roots and the aftercare is planned for three years to ensure it survives the trauma (my word not theirs). The post gave little information as to the reason for the move.\u00a0<\/p>\n\n\n\n<p>Reading on, amongst many congratulatory comments on the achievement, I spotted two that caught my eye. The first read \u2018<em>Wow \u2013 amazingly small rootball, next time I\u2019m told we can\u2019t move a mature tree\u2026\u2019 and the second \u2018amazing \u2013 an idea for the next tree that gets in the way!<\/em>\u2019\u00a0<\/p>\n\n\n\n<p>Red rag to a bull. I am a landscape architect and so you will be unsurprised at my response comment of <em>\u2018not sure trees get in the way\u2026 maybe the designs need rethinking to work with them<\/em>\u2019. \u00a0Quick retaliatory recovery from the architect \u2018<em>you are right \u2013 some of the most interesting projects as as a result of site<\/em> constraints\u2019.\u00a0<\/p>\n\n\n\n<p>This got me thinking. How long does a tree live? How long should a building last? Quizzing various helpful architects and consulting guidance to hand, I established that a school is designed to last 60 years, much the same as the average house.\u00a0 But underlying this is the \u2018Trigger\u2019s Broom\u2019 theory. (If like me you are a little shaky on your \u2018Only Fools and Horses\u2019 knowledge, you can check this out below\u2026<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Trigger&#039;s Broom\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/BUl6PooveJE?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>\u2026along with connections to Greek philosophy; <a href=\"https:\/\/rhodestothepast.com\/2018\/07\/05\/daft-as-a-brush-the-ancient-philosophy-of-triggers-broom\/\" target=\"_blank\" rel=\"noreferrer noopener\">Daft as a brush: the ancient philosophy of Trigger\u2019s\u00a0broom<\/a> <em>(credit to Paul Cassidy of IDP Partnership for his most amusing approach to my serious questioning)<\/em>.<\/p>\n\n\n\n<p>The theory is set out in NHBC guidance is that whilst the structural elements of a house should last minimum of 60 years, other non-structural elements have a much shorter requirement of 15 years.\u00a0<\/p>\n\n\n\n<p>DfE guidance sets out more minimum timescales for some external elements: 40 years for roads and pavements, 15 years for fencing and 10 years for external furniture.\u00a0<\/p>\n\n\n\n<p>But in comparison how long does a tree last? Broadly speaking the larger the species, the longer it lives. Let\u2019s take the London Plane. A beautifully statuesque large tree, fantastic at managing in atmospheric pollution, living with root compaction and able to filter out with particulate pollution. The earliest recorded London Plane is in Ely and is around 330 years old. This dates it back to the 1680\u2019s when James II was on the throne. AND\u2026. it\u2019s still growing! An extreme example but you get the point. The life expectancy of a London Plane that\u2019s unharmed by man or disease is, as yet, unknown. A single Plane tree, aged around 232 years, in London\u2019s Berkeley Square has been valued, as a natural asset by tree officers, for the sum of \u00a3750,000, recognising its contribution to green infrastructure, pollution control and heat gain prevention, as well as contributing to the health and well-being of the green space users.\u00a0<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" width=\"1024\" height=\"768\" src=\"http:\/\/www.terrafirmaconsultancy.com\/landscape-architect-blog\/wp-content\/uploads\/2021\/02\/Platanus-hispanica-35-40-cm-girth-1-1024x768.jpg\" alt=\"\" class=\"wp-image-2833\" srcset=\"https:\/\/www.terrafirmaconsultancy.com\/landscape-architect-blog\/wp-content\/uploads\/2021\/02\/Platanus-hispanica-35-40-cm-girth-1-scaled.jpg 1024w, https:\/\/www.terrafirmaconsultancy.com\/landscape-architect-blog\/wp-content\/uploads\/2021\/02\/Platanus-hispanica-35-40-cm-girth-1-300x225.jpg 300w, https:\/\/www.terrafirmaconsultancy.com\/landscape-architect-blog\/wp-content\/uploads\/2021\/02\/Platanus-hispanica-35-40-cm-girth-1-1536x1152.jpg 1536w, https:\/\/www.terrafirmaconsultancy.com\/landscape-architect-blog\/wp-content\/uploads\/2021\/02\/Platanus-hispanica-35-40-cm-girth-1-2048x1536.jpg 2048w, https:\/\/www.terrafirmaconsultancy.com\/landscape-architect-blog\/wp-content\/uploads\/2021\/02\/Platanus-hispanica-35-40-cm-girth-1-1140x855.jpg 1140w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>London Plane growing in Hillier Tree Nurseries<\/figcaption><\/figure>\n\n\n\n<p>Above is a London Plane at a size of 35-40cm girth. Not very large but certainly on the upper scale of affordable tree planting. It\u2019s already 22 years old \u2013 dating it back to 1999 as a seedling \u2013 the year the London Eye was lifted into position and the minimum wage was introduced at \u00a33.60 \/ hour.\u00a0<\/p>\n\n\n\n<p>A mere toddler as Plane trees go, but before a brick is laid it\u2019s already 1\/3 the age of the minimum expected lifespan of a school, which could have seen a new flat roof (at 15 years), new outdoor furniture twice (at 10 and again 20 years) and a new surface to the play area (at 20 years). If it got to \u2018Ely\u2019 age then the structural elements of the school could have been replaced 5 times over. I realise the last is stretching the imagination somewhat \u2013 but am I mad to think a modern school might be refurbished again and again for the next 300 years? Could it be? In the modern age are we just using the wrong materials or bowing to inadequate budgets? Will sustainability and technology prolong lifespans? Should you strive to make your next school\u00a0a perpetual \u2018Trigger\u2019s broom\u2019?\u00a0<\/p>\n\n\n\n<p>Even shrubs that take a bashing, being stood on whilst gutters are fitted and splashed with paint when the trades all get busy at the end of a project, could have already been growing longer than the project\u2019s rise from inception to construction. These are Hebes, in 10 litre pots, all around 5 years when brought to site and could last 10-20 years more. Far longer than the window blind systems.\u00a0<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" width=\"768\" height=\"1024\" src=\"http:\/\/www.terrafirmaconsultancy.com\/landscape-architect-blog\/wp-content\/uploads\/2021\/02\/hebw-10-768x1024.jpg\" alt=\"\" class=\"wp-image-2830\" srcset=\"https:\/\/www.terrafirmaconsultancy.com\/landscape-architect-blog\/wp-content\/uploads\/2021\/02\/hebw-10-scaled.jpg 768w, https:\/\/www.terrafirmaconsultancy.com\/landscape-architect-blog\/wp-content\/uploads\/2021\/02\/hebw-10-225x300.jpg 225w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><figcaption>Hebes growing in Hillier Container Nursery<\/figcaption><\/figure>\n\n\n\n<p>The problem is, however, that you can\u2019t apply the \u2018<em>Trigger\u2019s Broom<\/em>\u2019 theory to any plant. You have to start again if it starts to deteriorate. Or when it is moved and doesn\u2019t make it. Maybe the answer is indeed to work around them and give your average tree the fighting chance of being considered an opportunity, not a constraint, for this school, and the next school and the next\u2026.\u00a0<\/p>\n        <div class=\"booster-block booster-reactions-block\">\n            <div class=\"twp-reactions-icons\">\n                \n                <div class=\"twp-reacts-wrap\">\n                    <a react-data=\"be-react-1\" post-id=\"2827\" class=\"be-face-icons un-reacted\" href=\"javascript:void(0)\">\n                        <img decoding=\"async\" src=\"https:\/\/www.terrafirmaconsultancy.com\/landscape-architect-blog\/wp-content\/plugins\/booster-extension\/\/assets\/icon\/happy.svg\" alt=\"Happy\">\n                    <\/a>\n                    <div class=\"twp-reaction-title\">\n                        Happy                    <\/div>\n                    <div class=\"twp-count-percent\">\n                                                    <span 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I am a landscape architect and so you will be unsurprised at my response comment of \u2018not sure trees get in the way&#8230; maybe the designs need rethinking to work with them\u2019.  Quick retaliatory recovery from the architect \u2018you are right &#8211; some of the most interesting projects as as a result of site constraints\u2019. <\/p>\n","protected":false},"author":4,"featured_media":2833,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[63],"tags":[],"class_list":["post-2827","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-landscape-architect"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The \u2018Trigger\u2019s Broom\u2019 philosophy - terra firma blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.terrafirmaconsultancy.com\/landscape-architect-blog\/triggers-broom\/\" \/>\n<meta name=\"twitter:label1\" 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