Milford chronicle., 1954-07-30

i entrance hOof co the floor next above
Wnen such stairs are not a part OF a
required stairway
90 A flight Of stairs IN a building Of
nfepro0f construction, semiflreprOOf
construction, on q sprinklsred building
OF heaYy timber construction or Ordf-
nary construction or noncombustfbIe
construction, when such stairs con-
meet only one story with one other
story immediately above or below II
In such case the upper end of the
stairway shah not connect TO a hali-
way serving as an exit except through
a fire door,
go A flight Of stairs from a balcony
OF nezzanlne having an area not ex-
ceeding 25 per cent Of that az the
door Immediately below.
Nel openings. No openings except
the necessary dOorWays, and windows
opening TO the exterior of the bufld-
ing, shall be permitted in stair en-
closure required by this section. such
uoofWays Shal be equipped with aD-
proved self-closing fire doors, except
tnat Wnen ilre partitions are not sre-
quired for the enclosure, substantial
SeiI-clOslng metal or metal covered
doors or solid wooden doors Of fbe
ilush type Of nominal thickness not
less than ] y inches may be used. In
sehool buildings, doors on openings In
starr enclosures may have wired glass
panels; the area of such glass in anv
one door shall not exceed 40 square
Z Width Of interior stairways. The
minimum unobstructed width of a
stairway serving as a required exit
shall be not less than "A inches; pro-
Vlded thar in m'btsfamily houses and
storage buildings, and IN other build
ilBs occupied by a single tenant and
hmlted IN occupancy to 40 persons,
such width may be sc inches The
width of stairs shall be measured be-
tween hand rails except where hand
Ialls project not more than 315 inches
into such width
3. Treads and risers.
ta) Treads and risers Of required
stairs shall be so propOrtiOned that
lne product Of the width of tread, ex-
elusive Of nosing. and the height of
riser IN inches, shall be not less than
20 nor more than rs; but risers shall
not exceed ~ inches In height, and
tfeadss exclusive of nOsing, shall he
not less than 9la inches wide; except
Inat m schools the proportion and
dimensions OF the treads and risers
may m the discretion of the build
ing official, be adjusted to suit the
age Of the pupils for which the school
IS intended. Treads and risers shall
pc OF uniform width and height in any
one story.
.(b1 The use Of winders Is prohibit
ed in required stairways
8. Landings.
tal No flight of stairs shall have
vertical rise of more than l2 feet be-
tween floors or landings; except that
IN stalfWays serving as exits in pub
lie buildings such vertical rise Shall
not exceed 8 feet.
(b) The length and width of land
ings shall be not less than the width
OF stairways IN which they occur.
TO- Handrails.
0al Except for steps in aisles, stairs
shaii have walls or well secured bal
ustrades or guards on both sides.
Id such stairs when less than "a
inches IN width shall have handrails
on at least one side.
(el Such stairs when required to
De ~ inches or more in width shall
nave haadrails on both Sides
(dl Wnen the required width Of a
llRnt OF stairs exceeds 8S inches, an
intermediate handrail, continuous he
tween landings, securely supported and
terminating at the upper end in new-
els or standards at least feet high.
with no projections, shall be provided.
IL. Exit Railways The clear width
OF every hallway or passage leading
70 required exit shall be not less
tnan nan at the rate Of ~ inches for every
lOO persons TO be accommodated by
the hallway but not less than AZ
inches; provided that in multifamiiv
houses or IN case less than 20 per-
sons are to be accommodated the
minimum clear width may be s6
~. Width of doorwavs. The agpra-
gate clear width Of dOorways serVis.s
as required exits shall be not less han
at the rate OF % inches for every s1,s sc
persons to be accommodated. No exit
doorway serving at an exit for more
than 40 persons shall have a clear
w MlaIn iI OF less than "a inches nominal
13. Hanging Of doors
(al The doors Of required doorways
snaI De so hung and arranged that
when fully onened they will not IN
any way diminish or Obstruct the re-
quired width Of hallway, stair. or
other means of exit.
(b) DOorways opening onto a street
or to g court or open space COM
municating with a street, and serving
as a required exit way for more than
Az persons shall have the doors, in
cluding the doors of vestibules, SO
hung as to swing open in the direc-
tion of exit travel; but this require
ment shall not be construed to pro-
hibit the use Of sliding doors in sta
pies, garages, or shipping and receive
ing rooms Of business buildings and
storage buildings.
(c) All exit doors in rooms occuniad
py 40 or more persons and all exit
doors IN exit ways from places of as
semDly snail be hung to swing omen
IN the direction of exit travel
(d) No exit door shall open immed-
laIely on a flight of stairs, but a
lan0ing the length and width Of which |
are not less than the width of such |
door, shall be provided between such !
door and such stairs.
(e) Where the size of the exit door |
ways requires two doors In the same |
opening, the doors shall be so hung /
as to require no center post in the |
opening for the doors to close against.
l4. Lighting. Required staiFWaVs /
railways and other means of exit. in /
cluding exterior open spaces TO or |
through which exits lead. shall he /
kept adequately lighted al ali times |
occupied.
Section IS. Flreproof, Semjfireproof |
and Heavy Timber CONSTRUCTION.
fifepfoot, SemliireprOOf and heavy /
timber construction shall conform to /
generally accepted good practice. The |
ly49 Edition of the National BuiIding l
Code recommended By. the National /
Board of Fire Underwriters shall he /
leemeo the generally accepted good /
for these types of construc-
section II. Ordinary Construction.
1. 3Jefnltlon. Ordinary construe- \
..iOu' as apphed 10 buildings, means 4
mat IN which exterior walls and bear /
ng walls are of masonry or OF rein
'orced concrete, and in which the /
structural members, including coll 1
lmns, floors and roof construction. are 1
wholly or partly of wood Of smaller /
dimensions than required for heavy /
timber construction, or of steel or /
ron not protected as required for /
construction
q Walls.
(a) Exterior walls and all bearing
walls shall be Of masonry or Of re-
nfOrced concrete.
lb) Exterior walls which are within
feet Of q lot line along an adjoining
urea Wnlch Is or may be built upon Z
)r which are within 6 feet Of another
building Of other than ireproof or
construction on the same
Of snail nave a ire resistance rating /
II not less than hours; exoAet that
where the total area of the ildings
ioes not exceed IL times the allow
lble area for any one of the buildings
considered such fire resistance rating
hall not be required
3. Beams, girders and joists.