TJI stud bays vs double stud wall
我想从社区中听到，将12英寸TJI螺柱的使用与12英寸双螺柱墙（未交错）进行比较。假设（为了讨论），TJI螺柱将在您的语言环境中传递代码。我的主要问题如下：
Is the thermal bridging from the OSB web significant when compared to a double stud wall?
使用密集的纤维素时，2×4之间的间隙是否与单个空腔相比会产生困难的绝缘方案？
与双螺柱墙相比，使用TJI螺柱在构图时会提供更简单/速度吗？
两者之间的木材用法比较是什么，一个人使用的木材大得多？
这两种系统的任何其他想法，关注或困难都将受到高度赞赏。
Thank you
Dylan
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答复
Dylan,
Having built many double-stud houses but none with TJI walls, I can only guess.
TJIs would likely save labor but cost more in materials, so it's not clear where the cost comparison would end up. I can imagine it being quite difficult to tip up a 12" TJI wall, where double walls are typically raised separately and involve conventional building practices.
OSB Web不应是重要的热桥，并且整个壁R值可能非常相似。但是我不相信OSB是耐用的材料，也永远不会将其用于护套，屋顶甲板或底线。它还具有较高的体现能量以及苯酚甲醛树脂。
如果你知道的技术,我发现这洞容易多了se-packing an open double wall than isolated stud cavities, as I can install a lot of material from one spot. Also, a double wall allows wiring and mechanicals to be installed with no drilling - TJI's would require extensive drilling in isolated locations so as not to weaken them structurally (though this is less of an issue in a vertical orientation).
它是通过TJI完成的，但是使用双螺柱进行了很多频率，我发现一个Riversong Truss墙比任何其他此类深墙系统都容易，成本降低，资源效率高，更节能。
框架的差异在开口和角落最大。我想象的双框墙细节要容易一些。
基于问答中的并发“热桥”线，这是一个有趣的比较。我希望TJI墙的整个壁R值较高（隔热效果较小），但由于热桥梁的热度性能较差。少得多？可能不是，但是我很想看到它建模。
正如Rriversong指出的那样，OSB更容易受到水分损伤。我还尝试避免使用他注意的申请。
Initially OSB was considered a resource efficient material because it utilized scrap wood. Demand is high enough now the OSB manufactures do use virgin wood, likely rapidly grown plantation trees.
在适当的资源方面，即使这意味着要使用更多的木材，也可以最好地从当地的可持续林业实践中获得。工程木材是由大型公司制造的，通常代表较低的可持续林业管理。
这是对带有TJI墙壁建造的房屋的案例研究 -//m.etiketa4.com/homes/first-us-passive-house-shows-energy-efficiency-can-be-affordable
一个重要的警告是，如果您走进当地的伐木场，您会发现他们不会卖给您tji的钉子。他们说他们可能太“软盘”，因为它们不是为压缩负荷而设计的。
不过，找到独立工程师来标记其用作螺柱并不难。Katrin可能不得不这样做。但是TJI制造商的工程师通常不会做。
BTW a new company is supposedly ramping up production of foam sandwich boards that are the same strength and dimensions of 2x6's. I can't recall their name, but they are in Boulder, CO IIRC
感谢您的回答。我一直在考虑为我想建造的房子的DBL螺柱墙，但想获得其他人对使用TJIS的回应。
罗伯特（Robert）我喜欢你的河桁架墙，但是由于某种原因，我无法将自己的头缠绕在必要的细节上，以使桁架封住边缘托梁时，当平台框架并放在地下室墙上时（也许我只是累了）。
当非负载轴承壁在内部时，对我来说很有意义，但是当我将轴承壁移动到内部时，它就只是地下室壁的内部。您是否也必须移至12英寸的地下室墙，或者轴承墙不能直接位于地下室墙上。我的年制框架告诉我这是错误的，但是从工程的角度来看也许不是很重要。如果您可以提供与适当的施工细节的任何链接，我将非常感谢。
谢谢
Dylan,
有很多方法可以做到这一点。如果您用2英寸的泡沫板在外面绝缘，则内壁部分位于粉底上，外部框架将覆盖外部泡沫。您可以在延长的PT胶合板底座上支撑外部框架。
该系统可以用桁架墙或双壁系统完成，内壁带有地板组件，外墙带有屋顶。最好的方法取决于您的设计。
如果您尚未倒粉底，那么在混凝土墙中最多4英寸的XPS系统会在泡沫的每一侧创建一个带有4英寸混凝土的XPS的Thermomass系统。这非常适合双壁框架，几乎具有与外部绝缘混凝土相同的动态热质量优势，而无需将泡沫板暴露于紫外线，昆虫或机械损伤。
That foundation allows the inner wall to bear the upper floor while the outer sheathed wall bears the roof load. I just had a house I designed built like this for a client in VT.
嗨，罗伯特，
谢谢for the section views. I appreciate your approach and your distrust of OSB. I feel similarly. One question always comes to mind when I see double stud wall designs and I am hoping for your opinion. Do you worry about condensation on the inside of the cold plywood sheathing? Also, do you try to establish a vapor retarding or air retarding layer at the interior, at the drywall for instance?
我已经读了《建筑科学公司》的人们太多的作品，而不是想知道墙壁和寒冷的外部护套。我知道马克·罗森鲍姆（Mark Rosenbaum）建造了带有双螺柱墙壁的房屋，似乎觉得它们正常工作。我还看到了一些更接近我所在的位置（在西北太平洋地区），其中有2英寸的刚性绝缘层被添加到外部。当您使用双螺柱墙时，您的水分和空气方法是什么？
我的意思是，“关于厚墙……”
谢谢Robert, for the detail drawings. I am in very early planning stages, don't even have the land yet. I've been designing my house for a number of years now and have several different floor plans for different possible site topographies and solar orientations. Now that we are (hopefully) with in a year or two at most I am am making decisions about the various system choices. So that once we have purchased land I can begin drawing detailed plans in earnest.
I intended to build as much of the house as my skills and knowledge allow, i.e. I will contract the grading, excavation, basement walls, plumbing and electrical. I want to do much of the work myself; 1 because that has always been a goal in my life and 2 in order to reduce costs as much as possible. Concerning the foundation walls I haven't obtained any preliminary estimates in order to decide if a ThermoMass, Superior Wall, or other poured wall would be more cost effective than contracting a traditional block wall and then I build the insulated interior wall.
顺便说一下，我对墙系统的首选是带有草皮填充物的修改后的柱子和梁框架。但是，我发现我不太可能获得该系统的建筑贷款。考虑到该地区还有其他项目，在北卡罗来纳州阿什维尔，允许不会太大的斗争。
J栗子，
当我设置两个相同的宽度透明墙（11 1/4英寸以匹配TJI深度）时：
TJI wall (24 on center) = R-40
Double stud 2x4 wall (16 on center) = R-37.1
Spam filter won't let me post detailed breakdown of walls, but they're both cellulose dense packed.
克里斯托弗，
每个隔热良好的房屋都需要空气屏障和蒸气阻滞剂。我使用带有蒸气延迟底漆的气密管系统。每个新房子还需要机械通风以控制湿度和空气质量。
具有受控的室内湿度，蒸气阻滞剂，内部空气屏障组件和密集的纤维素绝缘材料，可抑制空气流量并容易储存，缓冲和重新分配水分，以及外部的“皮肤”，可以呼吸，水分在水冰层中积累不是问题。
我更喜欢锯木材的木材护套而不是胶合板，因为它的呼吸更好，而＃15感觉WRB胜过房屋包装，因为它也可以更好地散发水分。而且，我总是将木制壁板和固体彩色乳胶染色配以耐用性和透气性。
Moisture accumulation in the sheathing, particularly the all-too-common OSB, is a problem only if the sheathing is warm enough to generate mold or decay organism growth. The "warm sheathing" approach maintains perfect biological growth conditions if the sheathing should ever get wet. Cold and wet is not a problem - only warm and wet.
Dylan,
A block foundation is not as durable as a well-designed concrete foundation. You'll probably find that material costs are roughly the same for ThermoMass or block with interior insulation. If your basement will be living space, then you can't do better than ThermoMass. I'm not impressed with Superior Walls (with their steel framing and caulked joints) and the shipping of such heavy materials is not very green. I recently discovered ThermoMass and, if a full foundation is necessary, I think it's unbeatable for strength, water sealing, insect proofing, thermal mass - and it's perfect in the 4"/4"/4" configuration for a 12" thick wall.
再次感谢所有权衡我的问题以及所有其他投入的人。