Free-Standing Deck Footings
Small detached decks and other outdoor structures don't always need deep footings to be sturdy and code-compliant.
I’ll bet you didn’t know that the IRC doesn’t always require deck or shed基础to be below frost depth. It does require this when adeckis attached to a house, but if you’re building a shed or a freestanding deck, you don’t need frost footings. You only have to dig down to the mineral soil below the topsoil. That opens up some time, money, and back-saving options.
One of those options appears to be the泰坦甲板脚锚,一个镀锌的钢基础,价格低于50美元。要使用它,请挖一个15英寸。正方形孔到顶部土层下方。绳子在孔的底部打动,用压碎的石头填充它,然后用撞击扳手在24英寸长的锚固螺旋桨中驱动。泰坦还出售36英寸长的螺旋钻,用于沙质土壤或用于斜坡。螺旋钻的顶部是螺母的,该螺母将正方形的镀锌钢板拉到碎石上。随附的邮寄基座(为4x4和6x6提供),然后将其螺纹到螺旋钻。就是这样。
The Deck Foot Anchor’s auger provides some uplift resistance, which the inventor, Rich Bergman, says varies between 300 lb. and 2000 lb. depending on the soil type. Likewise, the load that each Deck Foot Anchor can support depends on the bearing capacity of the soil. Using the IRC’s default soil-bearing capacity of 1500 lb. per sq. ft., each 1-ft.-sq. Deck Foot Anchor could support 1500 lb. At the code-minimum 50-lb. design load, that’s 30 sq. ft. of deck or shed per footing.
任何浅基础的想法是,随着地下的地面冻结和扩展,结构可以上升,然后随着地面融化而沉降。一个问题是,土壤膨胀率随土壤类型及其含量而变化。据伯格曼(Bergman)称,甲板脚锚的底座通过通过垂直插槽插入的滞后螺栓连接到柱子上。如果土壤以不同的速度膨胀,该插槽可以进行一些差异运动。
One potential problem is that the Deck Foot Anchor has no engineering report, and it’s up to the local building department to allow its use.
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You can find detailed third party engineering reports showing the ultimate compression load the footing can bear (minimum of 19,000 lbs) at the resources section athttp://www.titanbuildingproducts.com。所以限制因素将轴承纳卡帕克ity of the soil you are building on. Softer soil, more footings needed. Harder soil, less footings required.
can these be used in massachusetts