8-1A-3-8: WOOD CONSTRUCTION:

   A.   Lumber:

      1.   Structural Stress-Graded Lumber: Spans for structural stress-graded and marked lumber shall be determined from National Lumber Manufacturers Association publications. See NLMA 1957 Edition.

      2.   Plywood: All plywood used structurally shall bear the identification of an approved testing agency as to type and grade of plywood, species of veneer and conformance with the appropriate U.S. Commercial Standard.

      3.   Lumber Dimensions:

         a.   Nominal sizes are given in these requirements unless noted otherwise.

         b.   Minimum finish dimensions, width and thickness, as follows:

   (Dimensions in Inches)

 

Nominal	Actual	Nominal	Actual	Nominal	Actual
1	3/4	4	35/8	8	71/2
2	15/8	5	45/8	10	91/2
3	25/8	6	55/8	12	111/2

 

   B.   Framing, General:

      1.   Structural Framing Members:

         a.   Splicing between bearing points not permitted.

         b.   When structural strength is impaired by cutting, drilling or by inherent defects, replace or reinforce members in manner acceptable to Building Official.

      2.   Framing at Chimneys:

         a.   Bearing of framing members on chimney masonry not acceptable. Piers built integral with chimney may be used for girder bearing provided end of girder is at least two inches (2") away from chimney masonry.

         b.   Framing members: No closer than two inches (2") to chimney masonry. Space may be one-half inch (1/2") if asbestos board one-fourth inch (1/4") thick and same width as framing members is used between masonry and framing.

      3.   Firestopping:

         a.   Firestop all furring, partitions and outside stud walls at level of each floor or ceiling and at juncture of roof rafters and wall.

         b.   Wood or masonry, tightly fitted, or other methods acceptable to Building Official may be used.

   C.   Floor Framing:

      1.   Columns and Posts:

         a.   Structural steel or iron. See Section 8-1A-3-7 hereof.

         b.   Wood posts: Bear on concrete base resting on footing, top of base three inches (3") above finish floor; securely fasten top of post to girder. If necessary for bearing, install bearing plate or cap secured to both post and girder.

      2.   Girders:

         a.   Material: Structural steel, reinforced concrete, solid wood or built-up wood.

         b.   Spans for wood girders: Determine in accordance with sound engineering practice and subject to approval of the Building Official.

         c.   Joints of solid and built-up wood girders to be made over pier or column supports only.

         d.   Air space each side of wood girders framing into masonry, one-half inch (1/2").

      3.   Level and grout with Portland cement mortar. Wood shingles, chips or similar material are not acceptable for permanent shims.

      4.   Joists:

         a.   Maximum spans for wood are as follows:

   MAXIMUM ALLOWABLE SPANS FOR FLOOR JOISTS

   Of other than structural stress-graded and marked lumber.

Lumber Size		Spacing Center to Center Inches	Maximum Allowable Spans
			Assumed live load 40 lbs. per sq. ft.
Nominal Inches	Actual Inches
			Feet	Inches
2 x 6	15/8 x 55/8	24	7	8
		16	9	1
		12	10	5
2 x 8	15/8 x 71/2	24	9	11
		16	12	1
		12	13	10
2 x 10	15/8 x 91/2	24	12	6
		16	15	2
		12	17	5
2 x 12	15/8 x 111/2	24	15	1
		16	18	3
		12	20	11
3 x 8	25/8 x 71/2	24	13	1
		16	14	11
		12	16	4
3 x 10	25/8 x 91/2	24	16	5
		16	18	10
		12	20	6
3 x 12	25/8 x 111/2	24	20	0
		16	22	7
		12	24	6

 

         b.   Framing into headers or side of wood girders: Use steel joist hangers metal framing anchors or wood bearing strip at least two inches (2") by three inches (3"). Notching of joist more than one-fourth (1/4) of depth not permitted.

         c.   Framing into side of steel girders: Allow one-half inch (1/2") clearance over top of top flange. Secure to girder or to opposite joists or bridge joist firmly at girder ends if other ends are fixed. Notch for bearing not more than one- fourth (1/4) of joist depth.

         d.   Framing into masonry:

            (1)   Minimum bearing, three inches (3").

            (2)   Fire cut or bevel, two inches (2").

            (3)   Second story floor joists parallel with masonry: Tie to masonry with metal straps extending over and secured to at least one joist and not more than eight feet (8') on center.

         e.   Butt or lap joists over girders and bearing partitions:

            (1)   Butting: Center and tie with metal straps or one inch (1") thick wood ties at least two feet (2') long.

            (2)   Lapping: At least four inches (4"); spike together; maximum projection beyond bearing, one foot (1').

         f.   Double joists:

            (1)   Under all bearing partitions and under plaster finished nonbearing partitions when parallel to floor joists.

            (2)   Where piping or duct work occurs, block joists apart at four foot (4') intervals.

            (3)   Under heading partitions, more than two (2) joists may be required by the Building Official depending upon loading conditions.

            (4)   Support of furnace unit: Double the floor joists framing each side of floor opening for plenum of furnace, spike joists together.

            (5)   Support of hot water heater, washing machine or special loading conditions: Double the floor joists supporting unit, especially where the equipment is aligned on both sides of a partition wall.

         g.   Headers and trimmers:

            (1)   Headers four feet (4') or less in length may be single; headers receiving three (3) or more tail beams, support in steel hangers or on ledger boards not less than two inches (2") by three inches (3"). If header is over seven feet (7') in length, secure ledger to trimmer with lag screws.

            (2)   For openings at end of joist, span with headers four feet (4') or less; trimmers may be single.

            (3)   Use double framing under all other conditions.

         h.   Cutting of floor joists:

            (1)   Notching top or bottom for piping and duct work is permitted to not more than one-sixth (1/6) minimum required joist depth except no notching in middle third of span; otherwise install header.

            (2)   Holes may be bored through joists, maximum diameter two and one-half inches (21/2"); edges not nearer than two inches (2") to top and bottom of joists.

         i.   Cross-bridging:

            (1)   Maximum spacing, eight feet (8'); minimum size, one inch (1") by three inch (3") double wall at each end; bridging split in nailing not acceptable.

            (2)   Rigid metal bridging may be used when acceptable to Building Official.

         j.   Cantilevered construction: Submit detail drawing.

      5.   Subflooring:

         a.   Wood boards:

            (1)   Thickness, one inch (1"); maximum width, eight inches (8"), unless triple-nailed. Maximum joists spacing, sixteen inches (16") on center.

            (2)   No two (2) adjoining boards to break joints over same joist space; each board to bear on at least two (2) joists.

            (3)   Other spacings may be used when subflooring is designed according to loads to be imposed.

         b.   Plywood:

            (1)   Minimum thickness for indicated joist spacing:

               One-half inch (1/2") (5 ply)

               Sixteen inches (16"), on center.

               Three-fourths inch (3/4") (5 ply)

               Twenty four inches (24"), on center.

               One and one-eighth inch (11/8") (7 ply)

               Forty eight inches (48"), on center.

            (2)   Minimum recommended width of girders, supporting floor loads for one and one-eighth inch (11/8") plywood at forty eight inches (48") on center is four inches (4"). Recommended sizes and spans for girders are:

 

4 x 6	Eight feet (8'0")
4 x 8	Eleven feet (11'0")
4 x 10	Fourteen feet (14'0")
4 x 12	Seventeen feet (17'0")

 

            (3)   Under nonstructural finish flooring, when used as a base for parquet wood finish flooring less than twenty five thirty-seconds of an inch (25/32") thick, linoleum, composition, rubber or ceramic tile, install solid blocking under all edges at right angles to floor joists.

            (4)   Nailing, nail securely to joists and blocking with nails six inches (6") on center on edges and ten inches (10") on center in intermediate framing members.

            (5)   As underlay, when used for leveling purposes over other subflooring, minimum thickness, one-fourth inch (1/4"), three (3) ply. (See subsection 8-1A-3-14D2 of this Article.)

         c.   Provide one-half inch (1/2") clearance between all subflooring and all masonry walls, chimneys and partitions.

         d.   Floors finished with any material other than hardwood, see subsection 8-1A-3-14D2 of this Article.

   D.   Ceiling Framing: See subsection 8-1A-3-1 of this Article.

      1.   Joists:

         a.   Maximum spans for ceiling or attic floor joists are as follows:

            (1)   For no attic storage, maximum access opening is six hundred (600) square inches.

            (2)   With larger access opening, design for limited attic storage.

            (3)   With permanent or disappearing stair, design according to floor joist table in subsection C4a of this Section.

   MAXIMUM ALLOWABLE SPANS FOR CEILING OR ATTIC FLOOR JOISTS

   Of other than Structural Stress-Graded and Marked Lumber

Lumber Size			Maximum Allowable Spans (Clear) For
			No attic storage. Assumed live load - none		Limited attic storage Assumed live load 20 lbs. per sq. ft.
Nominal Inches	Actual Inches	Spacing Center to Center Inches	Ft.	Inches	Ft.	Inches
2 x 4	15/8 x 35/8	24	8	9	6	0
		20	9	3	6	7
		16	10	0	7	4
		12	11	0	8	5
2 x 5	15/8 x 55/8	24	13	7	9	3
		20	14	4	10	2
		16	15	8	11	4
		12	17	1	13	1
2 x 8	15/8 x 71/2	24	18	1	12	5
		20	19	1	13	7
		16	20	11	15	2
		12	22	10	17	6
2 x 10	15/8 x 91/2	24			15	8
		20			17	2
		16			19	3
		12			22	1

 

         b.   Use ceiling joists as ties for rafters whenever possible.

         c.   Bridging: Solid, two inches (2") thick full depth of joists, staggered for end nailing. Joists eight inches (8") and over, one inch (1") by three inch (3") cross bridging or rigid metal bridging may be used; when acceptable to Building Official, maximum spacing, eight feet (8') on center.

         d.   Framing of ceiling joists over girders and bearing partitions: As required for floor joists. See subsection C4e of this Section.

      2.   Hung Ceilings, Flat Roof Construction:

         a.   Minimum size two inches (2") by four inches (4") on edge separated by wood or metal hangers, not more than ten feet (10') on center.

         b.   Ceiling joist bridging not required.

   E.   Roof Framing:

      1.   General:

         a.   Headers and trimmers:

            (1)   Headers four feet (4') or less in length may be single.

            (2)   When chimney is at ridge or eaves and header is four feet (4') or less, trimmers may be single; use double framing under all other conditions.

            (3)   Dormer windows not supported on partitions, double headers and rafters.

         b.   Anchor wall plates for rafters and roof joists on masonry wall. See subsection 8-1A-3-6E7 of this Article.

      2.   Pitched Roofs:

         a.   Minimum pitch: See subsection 8-1A-3-10a1 of this Article.

         b.   Maximum rafter spans are as follows:

   MAXIMUM ALLOWABLE SPANS OF RAFTERS AND FLAT ROOF JOISTS

   Of Other Than Structural Stress-Graded and Marked Lumber

   Between Plate and Ridge or Intermediate Support For Wood or

   Asphalt Shingles or Built-Up Roofing

   (Collar beams designed as compression members may be accepted as intermediate supports)

Lumber Size		Spacing C. to C. Inches	Maximum Allowable Spans (Clear) for Roof Slopes
			Greater than 3 in 12 measured on slope		3 in 12 or less measured horizontally
			Roofing Material Weight 5 lbs. per sq. ft. or less		Supporting finished ceiling		Not supporting finished ceiling
Nominal Inches	Actual Inches
			Ft.	Inches	Ft.	Inches	Ft.	Inches
2 x 4	15/8 x 35/8	24	7	6
		20	8	3
		16	9	2
		12	10	7
2 x 6	15/8 x 55/8	24	11	8	8	7	10	2
		20	12	9	9	5	11	1
		16	14	3	10	6	12	6
		12	16	5	12	1	14	4
2 x 8	15/8 x 71/2	24	15	6	11	5	13	6
		20	17	0	12	6	14	10
		16	19	0	14	0	16	7
		12	22	0	16	2	19	2
2 x 10	15/8 x 91/2	24	19	8	14	6	17	1
		20	21	6	15	10	18	9
		16	24	1	17	9	21	0
		12	27	10	20	6	24	2

 

         c.   Rafters: Cut for level bearing and spike to wall plate; no portions of cut end of rafters to project beyond inside edge of wall plate; frame rafters opposite at ridge; provide tie for rafters to prevent thrust and uplift.

         d.   Collar beams:

            (1)   Minimum size one inch (1") by six inches (6") or two inches (2") by four inches (4"); maximum spacing four feet (4') on center.

            (2)   When ceiling joists do not serve as tie at plate line or are not below lower third of rafters, install ceiling joists (collar beams) same size as rafters on each pair of rafters and make special provisions for tying the lower end of rafters to the floor or wall construction.

         e.   Ridge boards: Not required for simple gable roofs where rafters frame opposite each other. All other types, use two inch (2") member with depth not less than cut end of rafters.

         f.   Valley rafters:

            (1)   Minimum thickness, two inches (2"); minimum depth, not less than cut end of jack rafters.

            (2)   Maximum unsupported length of single valley rafters, eight feet (8'); double rafters, twelve feet (12').

            (3)   May be omitted when jack rafters of one roof frame on sole plate on top of roof sheathing of adjoining roof.

         g.   Crickets or chimney saddles at upper side of all chimneys not in contact with ridge.

      3.   Flat Roofs:

         a.   Roof joist spans: See subsection E2b of this Section.

         b.   Cross-bridging: Minimum size, one inch (1") by three inches (3"); maximum spacing, eight feet (8') on center.

         c.   Joists supporting hung ceilings: See subsection D2 of this Section.

         d.   Framing of roof joists over girders and bearing partitions: As required for floor joists. See subsection C4e of this Section.

      4.   Trussed Rafters: Trussed rafters may be used in construction of roofs for residence and buildings of similar size and design when designed according to generally accepted good engineering practices.

   F.   Exterior Wall and Bearing Partition Framing:

      1.   Studs:

         a.   Continuous lengths without splicing.

         b.   Minimum size, two inches (2") by four inches (4").

         c.   Maximum spacing for all construction, sixteen inches (16") on center; one story detached accessory buildings, twenty four inches (24").

         d.   Maximum length for balloon frame, twenty feet (20'); notch studs at second floor to receive one inch (1") by four inch (4") ribbon. Nail joists to studs.

      2.   Corner Posts: Not less than three (3) two (2) by fours (4) set to receive interior finish.

      3.   Corner Bracing:

         a.   Braces at external corners: One inch (1") by four inch (4"), let into outside face of studs and plates, set approximately at forty five degrees (45°), extend from sill to plate. Attaching ends of braces to blocks nailed to studs or plates not acceptable. May be omitted only when wood sheathing boards are laid diagonally or when fiberboard, minimum twenty five thirty-seconds of an inch (25/32") by four feet (4') by eight feet (8') is applied vertically.

         b.   Openings near corner: Use one inch (1") by four inch (4") knee braces, extending from corner post to sill and to top plate. Extend over at not less than three (3) stud spaces.

         c.   Openings at corner: Brace as in paragraph a above, set as near opening as possible.

      4.   Sill Construction:

         a.   Sill anchorage: See subsections 8-1A-3-5J4 and 8-1A-3-6B4 of this Section.

         b.   Sills and girders on top of foundation walls and piers: Level and grout with Portland cement mortar; wood not to be used for permanent shims.

         c.   Other methods may be used if detailed on drawings submitted with application and acceptable to Building Official.

      5.   Window and Door Openings:

         a.   Inner stud on jambs: Extend in one piece from header to bearing and nail to outer stud.

         b.   Headers for usual loading condition:

 

Size	Maximum Span
Two 2 x 4s on edge	3'6"
Two 2 x 6s on edge	4'6"
Two 2 x 8s on edge	6'0"
Two 2 x 10s on edge	7'6"

 

         c.   Where headers support concentrated loads or are subjected to other unusual loading conditions, the header shall be specially designed.

         d.   If desired, truss construction may be used.

      6.   Plates:

         a.   Top plates, two (2) two (2) by fours (4). Lap at corners and intersecting partitions. Single two (2) by four (4) acceptable for bearing partitions when studs occur directly under joists or rafters. When plates are cut for piping or duct work, install steel angles on each side of plate not less than one and one-half inches (11/2") by one and one-half inches (11/2") by one-eighth inch (1/8") to serve as plate ties and bearing for joists. Spike angles to joists and plates using not less than three (3) nails at each end. Alternate method for reinforcing cut plates - solid full depth two inch (2") header and metal tie one-half inch (1/2") by twelve (12) gauge with three (3) heavy nails or screws at each end.

         b.   Where headers support concentrated loads or are subjected to other unusual loading conditions, header shall be specially designed.

         c.   Sole plates, minimum thickness, two inches (2"); exterior wall studs may bear on the sill or on a sole plate on top of subfloor.

      7.   End studs of bearing partitions connecting to masonry walls. Anchor with bolts or spikes.

      8.   Wood bearing partitions in cellars or basements are not acceptable.

      9.   Studs to be continuous (balloon frame) when exterior is to have continuous stucco finish.

   G.   Nonbearing Partition Framing:

      1.   Studs:

         a.   Use continuous lengths without splicing.

         b.   Partitions exceeding six feet (6') of unsupported length containing openings. Size and spacing same as bearing partitions.

         c.   Partitions less than six feet (6') unsupported length with openings:

 

Minimum Size	Maximum Spacing
2 x 4s (2" thickness)	16" on center
2 x 4s (4" thickness)	24" on center
2 x 3s (3" thickness)	16" on center

 

         d.   Partitions six feet (6') or over in length without openings:

 

Minimum Size	Maximum Spacing
2 x 4s (2" thickness)	16" on center
2 x 3s (3" thickness)	24" on center
2 x 4s (4" thickness)	24" on center

 

      2.   Openings:

         a.   In two inch (2") thick partitions: Inner stud on jambs, size two inches (2") by two inches (2"), extend in one piece from header to bearing and nail to outer stud; or single frame with two inches (2") by six inches (6") jambs continuous from top plate to sole plate with header notched two inches (2") into each jamb.

         b.   In three inch (3") and four inch (4") thick partitions: Single framing permitted provided opening does not exceed three feet (3') in width and header is secured by spiking through jamb studs.

         c.   Headers:

            (1)   Opening width three feet (3') or less:

               2" thick partition, 2" x 4" on edge.

               3" thick partition, 2" x 3" flat.

               4" thick partition, 2" x 4" flat.

            (2)   Opening width over three feet (3'):

               2" thick partition, 2" x 4" on edge.

               3" thick partition, two 2 x 3s flat.

               4" thick partition, two 2 x 4s.

      3.   Top and Sole Plates: Minimum thickness, two inches (2"); lap top plate at outside walls and at bearing partitions.

      4.   Nonbearing Partitions: Wardrobes, cabinets or casework acceptable as non-bearing partition.

      5.   Sole Plaster Partitions:

         a.   Maximum unsupported length, sixteen feet (16').

         b.   Core: Three-eighths inch (3/8") or one-half inch (1/2") gypsum lath continuous from floor to ceiling and full width of door frames. Set in grooves of wood sill and plate members and of jambs and heads of door frames. Grooved member not required at intersection of walls to be plastered. At masonry wall intersections, tie or lace cornerite through lath core with wire. Butting units may be fastened as recommended by manufacturer and as approved by the Building Official.

         c.   Sill and plate members: Finished thickness, one and one- fourth inches (11/4") minimum. Securely nail to floor and structural framing.

         d.   Door frames: Mill built as finished frame. Thickness, one and five-eighths inches (15/8") minimum. Prime coat all sides. Secure to floor framing and sill members. Provide anchor for plaster by driving 8d nails on each side of lath, three- eighths inch (3/8") out from groove, at thirty degree (30o) angle with plane of lath, on twelve inch (12") centers staggered, then bend back against lath.

         e.   Pipes and conduits: Plumbing pipes not permitted. Moisture-resistant electrical conduit, tie securely to face of lath. Use shallow outlet box.

         f.   Coat core both sides with gypsum plaster to overall thickness of two inches (2"), three (3) coat or two (2) coat double-up work.

   H.   Wall Sheathing: Sheathing may be omitted on detached accessory buildings not containing habitable rooms.

      1.   Wood Boards:

         a.   May be used under any exterior finish material.

         b.   Minimum thickness, one inch (1") (25/32); maximum width, eight inches (8") unless triple-nailed; maximum stud spacing, twenty four inches (24") on center.

         c.   Break joints over center of studs unless end-matched (T&G) boards are used; no two (2) adjoining end-matched boards to bread joints over same stud space and each board to bear on at least two (2) studs.

         d.   Application: When laid diagonally, extend at forty five degrees (45°) in opposite directions from each corner; apply horizontally under stucco finish.

      2.   Plywood:

         a.   May be used under any exterior finish material.

 

b. Minimum thickness	Maximum stud spacing
5/16 inch	16 inches
3/8 inch	24 inches

 

         c.   Types of finish which affect the minimum thickness of plywood used:

            (1)   Under wood shingles: If five-sixteenths inch (5/16") plywood is used, apply shingles over one inch (1") by two inch (2") nailing strips using copper or galvanized nails for attaching shingles. Nailing strips may be omitted if annular ringed nails are used for attaching the shingles.

            (2)   Under asbestos-cement shingles and siding: If five- sixteenths inch (5/16") thick plywood is used, apply siding or shingle material with annular ringed nails. Do not apply over wood nailing strips.

      3.   Fiberboard: Structural. See FS-LLL-F-321b.

         a.   Under wood shingle siding: Apply one inch (1") by two inch (2") nailing strips over sheathing, spaced according to shingle spacing. Wood shingles may also be applied over fiberboard shingle backer and fiberboard sheathing with annular grooved nails at least two inch (2") length.

         b.   Asbestos-cement siding or asbestos-cement shingles shall be attached with special metal fastening devices.

 

c. Minimum thickness	Maximum stud spacing
1/2 inch	16 inches
3/4 inch	24 inches

 

      4.   Gypsum Sheathing Board: See ASTM C 79-54.

         a.   Asbestos-cement siding or asbestos-cement shingles shall be attached with special metal fastening devices.

         b.   Minimum thickness, one-half inch (1/2"); maximum stud spacing, sixteen inches (16").

         c.   Under wood shingle siding: Apply one inch (1") by two inches (2") nailing strips over sheathing, spaced according to shingle exposure.

   I.   Sheathing Paper:

      1.   Material:

         a.   Water-resistant building paper.

         b.   Asphalt saturated felt.

         c.   Vapor resistance shall be less than that of vapor barrier provided on inside of wall.

      2.   Application:

         a.   Use over all types of sheathing except as noted in paragraph 3 below.

         b.   Apply shingle fashion, four inch (4") lap. Lap four inches (4") over paper strips around openings.

         c.   Use six inch (6") side strips behind exterior trim of all exterior openings.

      3.   Paper not required over gypsum or fiberboard, factory treated to be moisture resistant, (except when used behind masonry veneer and stucco) provided:

         a.   Necessary corner and opening cuts are caulked with elastic waterproof caulking material. Corner joints may be protected with eighteen inch (18") widths of sheathing paper applied shingle fashion.

         b.   At heads of openings, bottom edge of board is located to permit head flashing to be extended under and turned up behind sheathing, and joint between head flashing and board is caulked.

   J.   Roof Sheathing:

      1.   Wood Boards:

         a.   May be used under any roofing material.

         b.   Minimum thickness, one and three-fourths inch (13/4"); maximum width, eight inches (8"); maximum rafter spacing, twenty four inches (24") on center.

         c.   Break joints over center of rafters unless end-matched (tongue and groove) boards are used; no two (2) adjoining end-matched boards to break joints over same rafter space and each board to bear on at least two (2) rafters.

         d.   Application: Lay closed under all roof material except wood shingles. Under wood shingles, use one inch (1") by four inches (4") shingle lath spaced according to shingles' exposure.

      2.   Plywood:

         a.   May be used under any roofing material.

         b.   Minimum thickness:

 

Roofing material	Rafters Maximum Spacing (inches)	Plywood Minimum Thickness (inch)
Wood and asphalt shingles	16	5/16
	24	3/8
Slate, tile and Asbestos-cement shingles	16	1/2
	24	5/8
Flat roofs	16	3/8
	24	1/2

 

         c.   Under wood shingles, apply one inch (1") by two inches (2") nailing strips over plywood less than three-eighths inch (3/8") thick, spaced according to shingle exposure.

         d.   Protect exposed edges of sheathing along eaves and rake of roof with mouldings or sheet-metal flashing. Flashing along eaves may be integral with gutters. If gutters are not installed, form the flashing to provide a drip.

      3.   Fiberboard: Acceptable for roof sheathing, two inch (2") minimum thickness.

   K.   Stair Stringers 1 :

      1.   Provide solid bearing on top and bottom.

      2.   Effective Depth of Wooden Stringers: Minimum, three and one-half inches (31/2").

      3.   Open Basement Stairs: Minimum stringer thickness, two inches (2").

      4.   Third Stringer: Install if treads are less than one and one-eighth inches (11/8") thick and stair is more than two feet six inches (2'6") wide.

   L.   Caulking:

      1.   Caulk around exterior openings in masonry or masonry veneer walls.

      2.   Caulk at intersections of wood and masonry except when flashed. This does not apply to tops of foundations.

      3.   Caulking shall remain elastic nonhardening and firmly adherent. (Ord. 0-71-12, 3-11-71)

 

Notes

1	1. See also Section 8-1A-2-8 of this Article.