The American Hardwood Export Council, Alison Brooks and Arup collaborate on 'The Smile' – a sculptural hardwood installation – for London Design Festival

软木也许是目前木材建筑选择的材料，但硬木只是制造了一个戏剧性的入口。
美国硬木出口委员会(AHEC)、伦敦建筑师艾莉森·布鲁克斯(AlisonBrooks)和阿鲁普(Arup)为今年伦敦设计节(伦敦设计节)设计了34M超长悬臂式弯管，他说：“这只是有史以来最具挑战性的事情。”

这个项目被称为“微笑”，它避开了通常的欧洲云杉，而是来自北美森林的快速生长的郁金香，它已经转变成12块巨大的交叉层合板(劳伦斯说，这是“有史以来最大的硬木CLT板”)，并由6，000根长钢螺钉连接在一起。

AHEC欧洲总监大卫·维纳布尔斯说：“和我们交谈的每一位建筑师都说我们喜欢CLT，但我们不喜欢它的外观！”该组织多年来一直在试验硬木结构，并相信这种材料的重量和密度与软木一样，但强度是软木的两倍，而且美观得多(结更少，木材纹理更紧密)。

维纳布尔斯承认，硬木的价格可能会更高，但你也需要少使用它。他说，将来我们会看到三层是软木，而外层是郁金香。劳伦斯补充说：“我们将看到它被应用在高端建筑中，而这些建筑的外观才是最重要的。”他补充道：“用木头进行设计最有趣的是，建筑师和工程师必须紧密合作，结构的制作和设计成为建筑的一部分。”

更令人兴奋的是，CLT是碳中性的，可持续的(用不到五分钟的时间，就可以用240立方米的郁金香来创造这个特别的“飞翔亭”)，用艾莉森·布鲁克斯(Alison Brooks)的话说，它“以一种不怀旧和乡土的方式将我们与大自然联系起来。”这是一种未来的材料。

Set outside London's Chelsea College of Art and Design, the sculpture eschews the usual European spruce for a fast-growing tulipwood from North American forests, that has been transformed into 12 huge cross-laminated panels held together by 6,000 long steel screws

'It is simply the most challenging thing that has ever been built in cross-laminated timber [CLT]… anywhere,' says Andrew Lawrence, an associate director at Arup, about the gravity-defying 34m-long cantilevering curved tube

Softwood may have been the material of choice for timber architecture up to now, but 'The Smile' sees hardwood make a dramatic entrance

The AHEC has been experimenting with hardwood structures for some years now and says the opportunities offered by hardwood are the same weight and density but twice the strength and a far more appealing aesthetic than softwood

'What’s so fun about designing in wood,' says Lawrence, 'is that architects and engineers have to work really closely together and the way a structure is made and engineered becomes part of the architecture'

keywords:London Design Festival, Installations

关键词：伦敦设计节，安装