Rakers just provide security when they are braced and footed appropriately; single-tube rakers alone do not normally offer this and require to be braced to avoid buckling. https://7zqzgj653c7ux4udgxdcyuii2unqszwgaxicyo7fju5jzmmzhhba.webpkgcache.com/doc/-/s/digitalmaine.net%2Fmediawiki3%2Findex.php%3Ftitle%3Dalexandersenharding2382