![]() ![]() He said to use an air gun because they don't split the wood, and if I tried to hammer in nails, there would be splitting which would weaken the boards. (60 year old house - outdated building codes!)Īfter talking to an experienced contractor, he advised me to make new collar ties higher up so I had enough head room, cover both sides with 1/2" to 5/8" plywood, then remove the old collar ties. So instead of there being a big triangle for each roof joist, peak to floor, I only had the strength of the collar tie to prevent spreading of the walls. Problem was, the floor boards were running the other direction, perpendicular to the "A" part. ![]() It had an A-frame roof with collar ties that I hit my head on when I walked up there. I was dealing with similar issues when I finished my attic. Were I you, I'd have a chat with an architect or structural engineer.īy the way, what's holding up the garage door openers? Usually they're mounted to the collar ties. All well and good, providing the floor is up to carrying that load. What the previous owners did was to try to convert the roof to a tent, with the column serving as a tent pole. I realize this is a very long explanation just for that conclusion, but the point is to help you understand the loading so you can reasonablly apply some common sense to come up with a good solution, as it is almost impossible to do so from one picture and a few lines of text. Being that this is a cinder block structure, and knowing that the mortar joints of such a structure have huge compressive strenth, but very little sheer strenth, I would be hesitant to do anything to add stress in that direction. This is going to apply the greatest stress to the corners, as the tops of the walls are being pushed out in both directions. Since a hip roof slopes in four directions, the "out" force is applied in four directions. Any roof with a peak is transferring load both down and out. It is true that a hip roof is in theory self supporting, but keep in mind where and how such a structure is transferring its load. The picture does not make it clear what the posts are doing, however, each of those posts are able to carry a load of 10's of thousands of pounds, which adds to the confusion of what they are intended to support. > to one of the places stating that square hip > Below is an example of the type of post > existing ties but they are higher up so do > roof (parallel to the doors) but they had a ![]() > not only did they span the length of the > there didn't seem to be structural because > isn't attached in any way to either the They can also provide some lateral support to the building. > know if this is correct? Can I remove theĭoes the vertical support (post?) go all the way down to the floor, or is it supported by a cross-member (or beam)?Ĭollar ties are used to keep the rafters from spreading apart - much the same way full-length ceiling joists would. > previous ties were temporary? Does anyone > joists or any other supports since the roof > shouldn't need any sort of collar ties, > metal support, the ones commonly used in > previous owners installed two garage door > had two collar ties running parallel to the > block garage with a square hip roof (pyramid They are extremely important in old structures.> So the house I bought has a detached cinder If you don't know what collar ties are, or what they are for etc., find out before you do anything. If you remove the old be carefull because the old may be holding the rafters in place acting like, or as, collar ties. You can remove the old ceiling or build below it. Build your walls and do your ceiling span on top of the new walls running the 12' 3" way. It's really pretty easy since you're planning to build new 2x4 walls around the perimeter. Regardless the building department wants it brought up to today's standard. I'm willing to bet some interior walls were removed already. If they are 1-5/8ths x 3-5/8ths they are newer than 1930. Plans will help everybody for sure but it sounds like someone renovated previously with no permit and even less building knowledge.ħ5 years puts it at the mid 1930's and that makes the 2x4's full size if they are original. ![]()
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