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§ 1583.01
<br />DWELLING HOUSE CODE
<br />82
<br />woodwork. Where a varnish finish is to be
<br />used, not less than two coats of spar varnish
<br />shall be applied. Wood shingles on side walls
<br />shall have not less than two coats of stain
<br />or paint, except that cedar, cypress and red-
<br />wood may be fmished by other methods ap-
<br />proved by the Building Official. The top and
<br />bottom of exterior doors, casement sash and
<br />bottoms of double-hung sash, shall have at
<br />least two coats of paint.
<br />(b) Metal surfaces. Unless metal is non-
<br />corrosive or has some other protective coat-
<br />ing, all sheet metal, ornamental iron, struc-
<br />tural steel or steel sash shall receive at least
<br />two coats of paint, one of which may be a
<br />shop coat.
<br />(e) Masonry surfaces.
<br />1. Material. Paint for the exterior side of
<br />concrete block and other open-textured ma-
<br />sonrywalls shall becement-water paint com-
<br />plying with FS TT-P-21, Type II, Class A or
<br />B, Other types of paint may be used when
<br />approved by the Building Official as suitable
<br />for use on concrete block or other open-tex-
<br />tured masonry walls. Paint for the exterior
<br />side of concrete, stucco; brick and similar
<br />smooth-textured masonry surfaces, shall be
<br />water-cement paint complying with FS TT-
<br />P-21 or ready-mixed paint of oil-base, syn-
<br />thetic resin-emulsion, oil-emulsion and rub-
<br />ber-emulsion types or job-mixed white-lead-
<br />in-oil paint for masonry surfaces or other
<br />prepared paint approved by the Building
<br />Official.
<br />2. Open textured exterior masonry walls.
<br />Concrete black and other open textured ma-
<br />sonry walls shall be waterproofed on the ex-
<br />terior side with not less than two coats of
<br />cement-water paint or other finish or water-
<br />proofmg material. The first coat of cement-
<br />water paint shall contain fine silica sand
<br />passing a No. 20 sieve and shall be applied
<br />with stiff bristle brushes. The second coat of
<br />cement-water paint may be applied with or
<br />without the fine silica sand, brushed on with
<br />calcimine or whitewash brushes or stiff
<br />bristle brushes.
<br />CHAPTER 83. ROOF COVERINGS.
<br />1583.01, General.
<br />(a) Roof slope. Except when materials
<br />and method of application permit other roof
<br />slopes approved. by the Building Official,
<br />shingle, slate and the roofs shall have a slope
<br />of not less than 4 in 12, except for porches in
<br />which the slope shall be not less than 3 in
<br />12; for built-up roofs, the slope shall be not
<br />more than 3 in 12.
<br />(b) Application. All shingle application
<br />shall start with a double row. Nails for at-
<br />taching roof coverings shall be copper, hot-
<br />dipped galvanized, or other non-corrosive
<br />type of nail approved by the Building Official.
<br />1583.02. Asphalt shingles.
<br />(a) Quality. Asphalt shingles shall be of
<br />a quality not less than that required for
<br />Class C roof covering materials as listed by
<br />the Underwriters' Laboratories, Inc. The
<br />minimum shipping weight per square shall
<br />be 205 lb. for square butt strip, 210 lb. for
<br />hexagonal strip and 240 lb. for individual
<br />shingle.
<br />(b) Underlay. Before applying asphalt
<br />shingles except, on roof slopes of 7 or more
<br />in 12, the sheathing shall be covered with an
<br />underlay of asphalt-saturated felt weighing
<br />approximately 15 lb, per square or asphalt-
<br />saturated and coated building paper weigh-
<br />ingapproximatel$~ 101b; per square. `. ,
<br />(c) Double thickness. Except at cut-outs
<br />and spacing between shingles not in excess
<br />of s/4 inch, the applied roof covering shall
<br />provide double thickness at all points.
<br />1583.03 Food shingles.
<br />(a) Quality. Wood shingles shall be No.
<br />1 grade, complying with CS31.
<br />(b) Thickness. The minimum thickness
<br />for 5 butts shall be 2 inches for 16" length,
<br />2~/4 inches for the 18" length and 2~ inches
<br />for the 24" length. The maximum exposure
<br />to the weather for wood shingles on slopes of
<br />less than 5 in 12 shall be one-fourth the
<br />length and for slope of 5 or more in 12, the
<br />maximum exposure shall be one-third the
<br />length.
<br />1583.04 Asbestos-cement shingles.
<br />(a) Quality. Asbestos-cement shingles
<br />shall have a dense, hard structure and be
<br />well seasoned and listed as not less than
<br />Class B roof covering material by the Under-
<br />writers' Laboratories, Inc, ' ' '
<br />(b)' Underlay. The roof sheathing shall
<br />be covered with an underlayer of asphalt-
<br />saturated asbestos or rag felt weighing not
<br />less than 141b. per square.
<br />(c) American method. Individual stand-
<br />ard shingles shall' weigh not less than 470
<br />lb'per'square"and strip shingles`shall weigh
<br />
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<br />Masonry
<br />§ 1541.04
<br />The least proof load, as determined by
<br />any type of test, shall be considered by the
<br />Building Official as the accepted proof load
<br />for that assembly. The allowable working
<br />load for the assembly shall be determined
<br />from the accepted proof load. After sub-
<br />tracting from the accepted proof load any
<br />dead loads that would be superimposed on
<br />the assembly in a completed structure, the
<br />allowable working or design load shall be
<br />one-half the remaining load.
<br />(b) When in the opinion of the Building
<br />Official, the methods or types of tests pre-
<br />scribed in ASTM E 72 are not applicable to
<br />a particular condition or type of construc-
<br />tion, the assembly or element shall be sub-
<br />jected to tests as set forth in Section 1555.05.
<br />In loading tests, the proof load and criteria
<br />for acceptance shall be not less than that
<br />set forth in subsection (a) of this section,
<br />CHAPTER 41. IYfASONRY.
<br />1541.01 General.
<br />Except as otherwise provided in this
<br />Dwelling House Code, the design of ma-
<br />sonry shall be in accord with -the ASA
<br />Masonry, A41,1.
<br />1541.02 Brick,
<br />(a) Clay or shale brick. All brick made
<br />from clay or shale shall conform to the re-
<br />quirements of ASTM C 62. Brick used in
<br />contact with soil, where subject to the frost
<br />action, shall be Grade SW or awell-burned
<br />brick of Grade MW with a record of use
<br />under similar conditions satisfactory to the
<br />Building Official. When subject to the action
<br />of the weather, or used in contact with soil
<br />where not subject to frost action, brick shall
<br />conform to Grade MW or better. When not
<br />subject to the action of weather or frost and
<br />not in contact with soil, brick shall conform
<br />to Grade NW or better.
<br />(b) Other clay or shale units. Other
<br />solid masonry units of. clay or shale shall
<br />meet the requirements far physical prop-
<br />erties of brick specified in (a) of this section.
<br />(c) Sand-lime brick. Sand-lime brick
<br />shall conform to the requirements of ASTM
<br />C 73. When used in contact with soil where
<br />subject to frost action, or when 'subject to
<br />the action of the weather, sand-lone brick
<br />shall conform to the requirements for Grade
<br />SW brick. When used in contact with soil
<br />where not subject to frost action, sand-lime
<br />brick shall conform to the requirements of
<br />Grade MW brick. When not subject to the
<br />action of weather and not used in contact
<br />with soil, sand-lime brick shall conform to
<br />the requirements for Grade NW brick or
<br />better.
<br />(d) Concrete brick. Concrete brick sub-
<br />ject to the action of weather or soil shaIl
<br />conform to the, requirements for' Grade A
<br />brick of ASTM C ~55.` -When-not, subject to
<br />the action of weather or'soil,'eoncrete brick
<br />shall conform to the requirements for Grade
<br />B brick of ASTM C 55.
<br />1541.03 Structural clay tile.
<br />(a) Load-bearing. All load-bearing struc-
<br />tural clay the shall conform to the require-
<br />ments of ASTM C 34. Where subject to the
<br />action of weather or soil, such the shall be
<br />Grade LBX or awell-burned, load-bearing
<br />the with a record of use under similar condi-
<br />tions satisfactory to the Building Official.
<br />Structural clay the used in load-bearing
<br />masonry, but not subject to action of weather
<br />or soil shall conform to Grade LB or better.
<br />(b) Non-load-bearing. Structural clay
<br />the used in interior non-load-bearing ma-
<br />sonry shall conform to the requirements of
<br />ASTM C 56.
<br />(c) Facing tile. Structural clay facing
<br />the shall be load-bearing structural clay the
<br />and shall conform to the requirements of
<br />ASTM C 212..
<br />1541.04 Concrete masonry units.
<br />(a) General. All concrete masonry units
<br />shall be thoroughly cured, of compact struc-
<br />ture, reasonably uniform in shape and free
<br />from cracks, warpage or foreign substances
<br />which would affect serviceability or strength.
<br />(b) Load-bearing, general. Hollow con-
<br />crete masonry units used in load-bearing
<br />masonry or where subject to the action of
<br />weather or soil shall conform to the require=
<br />menu of ASTM C 90, except that Grade B
<br />units shall not be used in exterior walls be-
<br />low grade or for exterior walls above grade
<br />unless protected against frost action.
<br />(c) Load-bearing in protected locations.
<br />The minimum compressive strength in
<br />pounds per square inch of average gross
<br />area for any individual hollow load-bearing
<br />concrete masonry unit used above grade,
<br />where protected against the action of, the
<br />weather either by location or by weather
<br />resistant coating or below grade where 'not
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