6×6张贴在两个故事甲板上的折断与屋顶
Looking for some guidance on where to break the 6×6 posts on a multi level deck that also carries a roof.
Splicing posts doesn’t seem to make sense because of structursl integrity and twisting. Can I stack the posts at decking level allowing them to twist at that point? This would divide post into three sections, ground to first level decking, first level decking to second level decking and then second level decking to roof.
What do I do about uplifting forces in this case?
Should I just leave it to an engineer?
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Replies
Terrell,
You can't splice them as you need the structure at each level to bear on the top of the posts. See figure 9 in the linked guide.https://www.awc.org/pdf/codes-standards/publications/dca/awc-dca62015-deckguide-1804.pdf.
At each level the post will stop under the beam that is supporting the deck or roof, and start on top of that beam.
I don't think you need an engineer unless there is something else at play (which will depend on both your location, and whether the decks will have sheathing to resist shear). The simplest way to specify the appropriate hardware is probably to use the Simpson guide.
https://www.strongtie.com/solutions/deckcenter
That being said, it's not a straightforward structure. You should have an experienced carpenter working with you.
Generally you run posts as long as possible as each section needs to be laterally braced in both directions. More runs more bracing which tends to take away form the look. Sometimes it is better to run a full height steel column and wrap it in wood. Besides lasting longer, it won't twist or check like a 6x6 would.
As for the actual structural details of a two story deck, that is definitely best left to an engineer. This is something that is very easy to build incorrectly.
+1在这里使用钢柱。从结构钢制造商中获取钢管。使管子运行柱的完整高度，并使它们在适当的地方焊接轴承板，以支撑您的甲板平台。让它们在板中打孔，让您将甲板平台结构拧到。注意，轴承板应该具有盖子或通道，用于静止彼此搁置，因此螺栓不剪切，而是仅将托梁/梁保持在板/鞍座组件中。
你会发现像这样制造的结构钢不是很贵。确保制造商为您推动它，然后用一个良好的保护涂料涂上它（我喜欢锈病停止生锈珐琅线）。你可以用木材包裹柱子，使它们看起来像木头，或者把它们留给钢，看起来像“现代”甲板结构一样好。您可能只需要3英寸的方形或圆形管，即使用木头缠绕柱子，您仍然可以进入6x6的占地面积。
Make sure to allow for lateral bracing with these columns. Sometimes using some steel channel beams or flitch plate style construction will allow for bolted steel connections to handle shear forces on the columns to provide the required bracing with minimal visual impact on your overall structure. This is how commercial steel construction works, with the steel part ultimately getting hidden within the finish materials.
Bill