1/1/1957 ZONING BY-LAWS Minutes - Laserfiche WebLink

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` -3- built 3`built to receive girder ends , or cement filled steel columns ma-,r be used. Para. 7. All areas under buildings must be accessible with a minimum clearance of 20 inches and be ventilated in two exterior walls , 'S Para. 8. No wooden structural member shall be closer than one inch to 6-the chimney, and -whenever. iooden forms or supports are used in the con- struction chimneys or fireplaces , then shall be removed within two weeks after masonry is laid. Para. 9 . Sizing and spacing of girders shall be in accordance with Tables, I, II , III , IV appended . Para. 10 ' ood floor joists . 1. 1")here joists frame into side of wood girders , mel,al hangers or a bearin - stri s piked to the g p x girder must be used., 2 . Floor joists framed into masonry walls shall have at least a,four inch bearing and a three inch fire bevel cut . 3 . Floor joists x' shall be doubled under all partitions running parallel to the floor joists . k 4 . All headers over four feet long shall be doubled. 5.. Floor Joists � shall be cross bridged when span exceed eight feet . At least one by three ' inch or stronger stock shall be used. Para. 11. Wood Rafters . 1. 1'.'ood Rafters . 1 . Truss construction may be used provided it is of a strength comparable with Table IV and is „h approved b-- tie Building Inspector. 2 . Collar ties riot less than 2x4 or lx6 inches shall be used for all sloping rafters . Para. 12 . Exterior gall studs . 1. Studs shall not be less than two inches by four inches placed not more than sixteen inches on center . 2. Headers over all openin s shall be doubled and shall be at least the following: , ( a) up to 31 -2 2x41s (b ) 31 to 52-1 -2 2x61s on edge . ( c ) 5 -' to' 71 -2 2xE•ls on edge . ( d) over 71 -2 2x101s on edge . 3 . In lieu of headers , approved truces may be used . 4. Studs in exterior frame walls may run froom still to roof line provided they do not exceed twenty feet in length. 5 . Studs shall not be spliced. 6. Floor joists on exterior walls shall bear on at least a one inch by six inch ribbon let into the face of the studding. Joists bearing on such ribbons shall be securely nailed to the studs . - Para. 13 . Plates : All top plates shall be not less than two inches by four inches doubled, which shall lap at all corners and joints or butes . Para. 14. Interior Partitions . 1. All bearing partitions shall be not less than two inches by four inches set the four inch way, and not more than sixteen inches on center. 2 . All openings in bearing partitions shall have double headers framed as required in exterior openings . 3 . Top Plates for bearing partitions shall be 'doubled. Para. 15 . Notching of Timbers : Notching of joists to facilitate the installation of pipes and ducts may be permitted with the following in- stallation s : 1. Top and bottom edges may be notched not to exceed one sixth of the joist depth. Notching will not be permitted in middle third of any joist span. 2 . If cutting of a floor joist is necessary, a header the full depth of the joist shall be cut in to support the ends of the joists . i' I