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Message: <blockquote data-quote="red dirt shootist" data-source="post: 4245765" data-attributes="member: 52708"><p>Collar ties are usually at the top of walls and go to the outside of the wall. If your building is 40 foot wide, your tie is 40 foot, just like the bottom cord of a truss. When you have a snow or wind load the ridge is pushed down and the walls are pushed out, causing collapse, but the tie prevents that. The tie doesn't have to be at wall height, on scissor trusses like yours they can be higher, but the higher they are the less effective they are. If you have enough cable you can make the ties out of that, you can also make x braces for the roof with cable, if you have it, use it.</p></blockquote><p></p>