(A) Joist hangers shall be installed for floor joists with a span greater than 4' or when it carries any other loads.
(B) Joist hangers shall be installed at ceiling joists with a span greater than 8' or when it resists the outward thrust of the rafters.
(C) Joist hangers shall be installed for roof rafters with a span greater than 8' or if it carries other roof rafters.
(D) Joist hangers or 90 degree clips shall be installed for rafters when framed into the side of a ridge beam where ceiling joists are not installed.
(E) When a knee-wall is supporting two stories and a roof, the knee-wall shall be constructed with minimum 2x6 studs with structural sheathing not less than 7/16" thick.
(F) Beams shall not rely solely on bolts attaching beam members to the side of posts.
Exception 1: Minor loads of less than 200 pounds.
Exception 2: A treated 2 x 4 may be nailed to the post directly below the beam members and extend to the concrete.
Exception 3: A mechanical support bracket designed to carry the load may be installed directly to the post below each beam member.
Exception 4: Existing portions of existing decks where work is not performed.
(G) The minimum bottom chord dead load of trusses shall be 4 p.s.f. but not less than the actual dead loads.
(H) Two feet of the 3' landing required at the bottom stairs shall be prior to a door.
Exception: Existing conditions will be taken on a case by case basis depending on configuration but maximum distance shall be provided.
(I) Structures are required to have a complete load path from the roof to the sill plate attached to the foundation. Trusses are required to have tie downs at each truss to the above grade wall assembly. Rafters are required to have tie downs 4 feet on center to the above grade wall assembly. The minimum tie-down for walls shall be 18 gauge straps installed on both sides of corners and every 25' for single story structures. For 2-story structures or single story structures with knee walls the minimum tie-down shall be 18 gauge wall straps installed on both sides of corners and every 20'. These straps attach from 2nd floor stud to first floor stud and first floor stud to basement knee walls or sill plate. Plywood can also achieve the tie down if it extends from sill plate to 1st floor studs and 1st floor studs to 2nd floor studs or creates a joint at the rim joist or 1/2 way on a 2 x 4 plate.
(J) Double top plates in above grade wall construction shall overlap 4'.
(K) Rafter ties installed 4' on shall be allowed to resist the outward thrust of the rafters provided this span table is used. This span table is not designed for storage or for the attachment of any interior finishes.
2 x 4 | 12' max span |
2 x 6 | 18' max span |
2 x 8 | 24' max span |
2 x 10 | 27' max span |
2 x 12 | 30' max span |
(L) Exterior posts shall have a post/pier bracket protecting them from moisture.
(M) Exterior posts shall have a connection from beam to supporting post. Toe nails shall not provide the only connection.
(N) Double floor joists shall be required at the ends of decks parallel with the floor joists for guardrail attachment. This double floor joist shall be allowed to be separated by the post for the guardrail.
Exception: Posts that extend from concrete to top of guardrail.
(O) When deck guardrails are installed to the floor framing of the deck the minimum floor joist size shall be 2 x 8.
(P) A double window sill framing member shall be installed when a framed opening is more than 7' for 2 x 4 wall construction and 9' for 2 x 6 wall construction.
(Q) Bridging shall be required at mid-span of floor joists with a span greater than 10'. X bracing or solid blocking of any kind is acceptable.
(R) Stiff backs, a 2 x 4 framing member nailed perpendicular to ceiling joists, shall be required at mid-span for ceiling joists with a span greater than 10'.
(S) Roof sheathing must be 5/8" thick plywood or OSB if supporting framing member is spaced at 24" on center, 1/2" thick plywood or OSB if supporting framing member is spaced at 19.2" on center or 7/16" thick plywood or OSB if supporting framing member is spaced at 16" on center. Roof sheathing shall be repaired or replaced if damaged when shingles are removed during reroofing operations. If more than 50% of an existing roof plane requires replacement that roof plane must meet these roof sheathing requirements.
Exception 1: Lumber sheathing (planks) in compliance with R803.1 and Table R803.1 of the 2018 International Residential Code.
Exception 2: Alternative methods and materials in the 2018 International Building Code (IBC).
(T) SR-102 (APA simplified wall bracing method using wood structural panel continuous sheathing) shall be allowed to be used for wall bracing requirements.
(U) Ladder framed gable end roof overhangs shall be limited to a total of 12". Whenever this is exceeded a design must be submitted.
(V) Handrails for single family homes, duplex's and townhouses installed separately from a guardrail may be installed anywhere between 30" to 38" above the outer most portion of the stair tread. If the handrail also acts as the guardrail it must meet the 34" minimum height requirement for guardrails
(W) A 2 x framing member attached to the top of the ceiling joists shall be an approved method to prevent rotation of open ended ceiling joists.
(X) Seven-sixteenth inch wood structural panels (plywood or OSB) shall be used to brace exterior wood frame walls. Drywall shall not be an approved method of wall bracing.
Exception: Existing structures undergoing remodeling activities will be allowed to use let in bracing for wall bracing on exterior walls.
(Y) Where plywood is installed on floor joists it shall not be less than 3/4" tongue and groove floor sheathing.
Exception: Where matching the existing floor sheathing is desired.
(Z) Above grade wood frame wall construction carrying roof and ceiling loads only shall be allowed to have 19' stud lengths provided they are construction grade 2 x 6 framing members (#2 or better) spaced at 16" on center, have 2 x 6 solid blocking at all plywood joints and have 7/16" continuous structural sheathing.
(AA) Above grade wood frame wall construction carrying one floor, roof and ceiling loads only shall be allowed to have 18' stud lengths provided they are construction grade 2 x 6 framing members (#2 or better) spaced at 16" on center, have 2 x 6 solid blocking at all plywood joints and have 7/16" continuous structural sheathing.
(BB) Above grade wood frame wall construction carrying one floor, roof and ceiling loads only shall be allowed to have 12' stud lengths provided they are construction grade 2 x 4 framing members (#2 or better) spaced at 16" on center, have 2 x 4 solid blocking at all plywood joints and have 7/16" continuous structural sheathing.
(Ord. 21-102, passed 8-19-2021)