Whatever name you prefer, I have a question on how far they are allowed to extend out vs how far they extend back into the attic. I am of the understanding that the ratio is 1:1. A 'normal' gable end stick-out is often 2', so the first truss, to which said ladder rafters abutt, should be inset 2' from the gable truss. It is my understanding that this 'balance' will prevent lifting of the first truss if, say, the ladder rafters instead stuck out 4' and back in only 2'. (Gable truss is the fulcrum.) If 1:1 is the recommended ratio, how far can you push that if you assume a 30-40 psf snow load? 1.5 out to 1 in?
2 out to 1 in? We will assume that the supporting member (fly/ladder rafter) is strong enough to hold the load. All I am concerned about is the ratio of stick-out to stick-in.
Unfortunately, I don't think code gives specific guidance for lookouts. The rule of thumb ratio for cantilevering is 2:1, but for rafter lookouts, you typically you just go back to first common rafter (assuming it's at normal spacing from gable wall). Typically, lookouts don't extend more than 2', and I would caution against exceeding that. If you're going 2' and with that much snowload, I would do so only with 24' OC rafter spacing, and install the lookouts on edge, not flat. That latter, however, requires the gable rafter/truss to be sized accordingly (3-1/2' below common rafters profile). If you can't install the lookouts on edge, I'd stick with 1' max overhang.
About every 10 years in order to keep the infrastructure of your home in sturdy and safe condition. While there are many options in the kind of roof you may wish to install, two of the most common materials are composite shingles and wood shakes. One of the reasons these are common is that they are among the most economical yet reliable of all roof types available. Of the two, which is the best roof? Only you would know the answer. Here are some pros and cons for each to help you decide.
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Susceptible to mold and wood rot. Possible fire danger.
Again with the portico project. I'm extending the gable end of the roof out about 12-14'. Do I need to add lookout rafters so that the fly rafter has something to hang on to other than just the ridge board and fascia trim? The overall width is 93' (from bird's mouth to bird's mouth) and I'm using 2x6 stock for the rafters and 2x for the ridge.
I don't want to support the rafter or ridge board on the gable end because I want to fill the space with glass. I'll be using rafter ties high up, however. If I do need to add lookout rafters, can I notch the 2x6 rafter out by 1 1/2' and lay the 2x4 on the flat or will that remove too much structure? The old portico (shown) extended out about 6' but was just attached to the roof sheathing and fascia trim. Again with the portico project.
Roof Lookouts Spacing
I'm extending the gable end of the roof out about 12-14'. Do I need to add lookout rafters so that the fly rafter has something to hang on to other than just the ridge board and fascia trim? The overall width is 93' (from bird's mouth to bird's mouth) and I'm using 2x6 stock for the rafters and 2x for the ridge. I don't want to support the rafter or ridge board on the gable end because I want to fill the space with glass. Dragon ball z budokai tenkaichi 3 gameshark.
I'll be using rafter ties high up, however. If I do need to add lookout rafters, can I notch the 2x6 rafter out by 1 1/2' and lay the 2x4 on the flat or will that remove too much structure? I am trying to do the exact same thing, but with 2x8 rafters. I'll see if anyone else responds to your thread.
Clutch, I would suggest you install a 2x6 across your rafter tails parellel to your ridge rafter. Make it the same length as the ridge,use 2x6 from this to the ridge.
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This adds strength and is a good base for your ply. Then install 1x gutterboard on the face.
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Put in another rafter for support in the center and use 3/4 sheathing. It will be plenty strong. That will work, I was planning on using 2 more sets of rafters and use 1/2 ply. I've already got the 1/2' sheathing stock but I could always use it for headers. If I use a 2x 'sub-fascia', will I need to block the gable end overhang? Cabal latest patch.
Does the fly rafter get attacted to the ridge board just like the common rafters or does it get nailed through the end grain of the ridge?