HomeMy Public PortalAboutORD-CC-1980-10CITY OF MOAB
ORDINANCE NO. 10-80
AN ORDINANCE AMENDING A PORTION OF ORDINANCE NO. 9-77,
CHAPTER 5, SECTION 1, BUILDINGS, MOAB CITY CODE 1965.
BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF MOAB, UTAH:
THAT Section 5-1 of the Ordinances of Moab City, 1965, is hereby
amended to read as follows:
Section 5-1. Building Code --Adopted.
That certain codes establishing rules and regulations for the
regulation and control of the design, construction, quality of
materials, use and occupancy, location and maintenance of build-
ings, and structures entitled "Uniform Building Code," 1976 Edition,
printed as a code in book form, adopted by the International Con-
ference of Building Officials is hereby adopted as the building
code of the City, and by this reference is made a part of this
chapter to the same extent of the "Uniform Building Code," 1976
Edition, relating to fees and with respect to fees Section 5-3 is
confirmed and approved.
Section 2405: Unburned Clay Masonry shall be amended and read
as follows:
(a) General. Masonry of unburned clay units shall not be
used in any building more than two (2) stories in height. The
height of every laterally unsupported wall of unburned clay units
shall be not more than ten (10) times the thickness of such walls.
Exterior walls, which are laterally supported with those supports
located no more than twenty-four feet (24') apart, are allowed a
minimum thickness of ten inches (10") for single story and a mini-
mum thickness of fourteen inches (14") for the bottom story of a
two (2) story with the upper story allowed a minimum thickness of
ten inches (10") . Interior bearing walls are allowed a minimum
thickness of eight inches (8").
(b) Compressive Strength. The unit(s) shall have an average
compressive strength of three hundred (300) pounds per square inch
when tested in accordance with ASTM C67. One sample out of five (5)
may have a compressive strength of not less than two hundred fifty
(250) pounds per square inch.
(c) Module of Rupture. The unit shall average fifty (50) pounds
per square inch in modulus of rupture when tested according to the
following procedure:
1. A cured unit shall be laid over (cylindrical) supports
two inches (2") in diameter, located two inches (2") from each
end, and extending across the full width of the unit.
2. A cylinder two inches (2") in diameter shall be laid
midway between and parallel to the supports.
3. Load shall be applied to the cylinder at the rate of
five hundred (500) pounds per minute until rupture occurs.
4. The modulus of rupture is equal to 3WL2
2Bd
W = Load of rupture.
L = Distance between supports.
B = Width of brick.
d = Thickness of brick.
ORDINANCE NO. 10-80
(d) Soil. The soil used shall contain not less than twenty-
five percent (25%) and not more than forty-five percent (45%) of
material passing a No. 200-mesh sieve. The soil shall contain suf-
ficient clay to bind the particles together and shall not contain
more than 0.2 percent (.2%) of water-soluble salts.
Most clayey loams, except those with a high clay content, are
suitable, but it is not practicable to make a selection on the basis
of soil analysis only. Soils having a high clay content shrink or
crack badly when drying, and sandy soils do not have sufficient bond
ing material to prevent crumbling.
Neither of these soils should be used alone for brick, but a
very good building material can be obtained by mixing the two (2)
soils together in proportions that will overcome the undesirable
qualities of each. The best way to determine the fitness of a soil
is to make a sample brick and allow it to cure in the open, protecte
from moisture. It should dry without serious warping or cracking.
(e) Classes of Adobe.
1. Treated Adobes. The term "treated" is defined to mear
adobes made of soil to which certain admixtures are added in
the manufacturing process in order to limit the adobe's water
absorption in order for it to comply with paragraph (h) below.
Exterior walls constructed of treated adobe require no addition
protection. Stucco is not required. In order for the wall to
so comply, the mortar must be of Type S of adobe soil treated
with an additive to make the mortar comply with the same water
absorption requirement in paragraph (h) below.
2. Untreated Adobes. Untreated adobes are adobes which c
not meet the water absorption specifications of paragraph (h)
below. This shall hold even if some water absorption protect" -
agent has been added. The determination as to whether an adob
is treated or untreated is to test for compliance with paragra
(h) below. Exterior walls of untreated adobe are allowed but
must comply with paragraph (o) requiring Portland cement plast
applied to the outside. Use of untreated adobes is prohibited
within four inches (4") above the finished floor grade.
finishTreat
adobes may be used for the first four inches (o) above
floor grade. Mortar must be Type S (or masonry mortar) or ado
soil (either treated or untreated).
(f) Sampling. Each of the tests prescribed in this Section s
be applied to five (5) sample units selected at random from each try,
five thousand (25,000) bricks to be used.
(g) Moisture Content. The moisture content of the unit shall
not more than four percent (4%) by weight.
(h) Absorption. A dried four inch (4") cube cut from a sampl
unit shall absorb not more than two and one-half percent (2 %) moi:
by weight when placed upon a constantly water -saturated, porous sur
for seven (7) days.
(i) Shrinkage Cracks. No units shall contain more than thre(
shrinkage cracks, and no shrinkage crack shall exceed three inches
in length or one -eighth inch (1/8") in width.
(j) Use. No adobe shall be laid in the wall for at least the
(3) weeks after making, dependent on weather conditions.
"
O R D I N A N C E N O . 1 0 - 8 0
( k ) F o u n d a t i o n s . A d o b e s s h a l l n o t b e u s e d f o r f o u n d a t i o n o r
b a s e m e n t w a l l s . A l l a d o b e w a l l s , e x c e p t a s n o t e d u n d e r G r o u p M
B u i l d i n g s , s h a l l h a v e a c o n t i n u o u s c o n c r e t e f o o t i n g a t l e a s t e i g h t
i n c h e s ( 8 " ) t h i c k a n d n o t l e s s t h a n t w o i n c h e s ( 2 " ) w i d e r o n e a c h
s i d e t h a n t h e f o u n d a t i o n w a l l s a b o v e . A 1 1 f o u n d a t i o n w a l l s w h i c h
s u p p o r t a d o b e u n i t s s h a l l e x t e n d t o a n e l e v a t i o n n o t l e s s t h a n s i x
i n c h e s ( 6 " ) a b o v e t h e f i n i s h g r a d e .
F o u n d a t i o n w a l l s s h a l l b e a t l e a s t a s t h i c k a s t h e e x t e r i o r
w a l l a s s p e c i f i e d i n S e c t i o n 2 4 0 5 ( 1 ) . W h e r e s t e m w a l l i n s u l a t i o n
i s u s e d , a v a r i a n c e i s a l l o w e d f o r t h e s t e m w a l l w i d t h t o b e t w o
i n c h e s ( 2 " ) s m a l l e r t h a n t h e w i d t h o f t h e a d o b e w a l l i t s u p p o r t s .
( 1 ) E x t e r i o r W a l l s . A 1 1 w a l l s o f a d o b e ( t r e a t e d o r u n t r e a t e d )
s h a l l n o t h a v e t h i c k n e s s e s l e s s t h a n t h a t a l l o w e d i n p a r a g r a p h ( a )
a b o v e . M o r t a r s h a l l b e i n a c c o r d a n c e w i t h p a r a g r a p h ( e ) 1 a n d ( e ) 2
a b o v e d e p e n d i n g o n t h e c l a s s o f a d o b e b e i n g u s e d . A l l a d o b e b r i c k
s h a l l b e l a i d u p w i t h f u l l s l u s h ( b e d ) j o i n t s a n d s h a l l b e b o n d e d
( o v e r l a p p e d ) n o t l e s s t h a n f o u r i n c h e s ( 4 " ) . W a l l s o f t r e a t e d a d o b e
w h i c h d o n o t r e q u i r e a p r o t e c t i v e o u t e r c o a t i n g m u s t a l s o b e l a i d
u p w i t h f u l l h e a d ( e n d ) j o i n t s . A l l e x t e r i o r a d o b e w a l l s s h a l l b e
t o p p e d w i t h a c o n t i n u o u s b e l t c o u r s e o r t i e b e a m ( e x c e p t p a t i o w a l l s
l e s s t h a n s i x f e e t ( 6 ' ) h i g h a b o v e s t e m ) . A t t h e t i m e o f l a y i n g ,
a l l u n i t s s h a l l b e c l e a n a n d d a m p a t t h e s u r f a c e .
( m ) C o n c r e t e T i e B e a m . S h a l l b e m i n i m u m s i z e S i x i n c h e s ( 6 " )
b y d e p t h o f w a l l u p t o a t e n i n c h ( 1 0 " ) w i d t h . F o r w a l l s t h i c k e r
t h a n t e n i n c h e s ( 1 0 " ) , a t e n i n c h ( 1 0 " ) t i e b e a m w i l l s u f f i c e . A l l
c o n c r e t e t i e b e a m s s h a l l b e r e i n f o r c e d w i t h a m i n i m u m o f t w o ( 2 )
N o . 4 r e i n f o r c i n g r o d s e a c h f l o o r a n d c e i l i n g p l a t e l i n e .
( n ) W o o d L i n t e l s o r T i e B e a m s . S h a l l b e m i n i m u m s i x i . n c h e s
( 6 " ) b y w a l l w i d t h u p t o a t e n i n c h ( 1 0 " ) w i d t h . F o r w a l l s t h i c k e r
t h a n t e n i n c h e s ( 1 0 " ) , a t i e b e a m o f t e n i n c h ( 1 0 " ) t h i c k n e s s s h a l l
s u f f i c e . T h e w o o d e n t i e b e a m s h a l l b e o v e r l a p p e d , o r s p l i c e d , a t
l e a s t s i x i n c h e s ( 6 " ) a t a l l j o i n t s . A l l j o i n t s s h a l l h a v e a w a l l
b e a r i n g o f a t l e a s t t w e l v e i n c h e s ( 1 2 " ) . W o o d t i e b e a m s m a y b e s o l i d
i n t h e s i x i n c h ( 6 " ) d i m e n s i o n o r m a y b e b u i l t u p b y a p p l y i n g l a y e r s
o f l u m b e r . N o l a y e r s h a l l b e l e s s t h a n o n e i n c h ( 1 " ) . W o o d j o i s t s ,
v i g a s o r b e a m s s h a l l b e s p i k e d t o t h e w o o d t i e b e a m w i t h l a r g e n a i l s
o r l a r g e s c r e w s . A 1 1 l i n t e l s , w o o d o r c o n c r e t e , i n e x c e s s o f n i n e
f e e t ( 9 ' ) s h a l l h a v e s p e c i f i c a p p r o v a l o f t h e b u i l d i n g o f f i c i a l .
( o ) P l a s t e r i n g . A l l u n t r e a t e d a d o b e s h a l l h a v e a l l e x t e r i o r
w a l l s p l a s t e r e d o n t h e o u t s i d e w i t h P o r t l a n d c e m e n t p l a s t e r , m i n i m u m
t h i c k n e s s t h r e e - f o u r t h s i n c h ( 3 / 4 " ) i n a c c o r d a n c e w i t h C h a p t e r 4 7 .
P r o t e c t i v e c o a t i n g o t h e r t h a n p l a s t e r i s a l l o w e d , p r o v i d e d s u c h c o a t -
t i n g i s e q u i v a l e n t t o P o r t l a n d c e m e n t p l a s t e r i n p r o t e c t i n g t h e u n -
t r e a t e d a d o b e s a g a i n s t d e t e r i o r a t i o n a n d / o r l o s s o f s t r e n g t h d u e t o
w a t e r . M e t a l w i r e m e s h m i n i m u m 2 0 g a u g e b y o n e i n c h ( 1 " ) o p e n i n g
: h a l l b e s e c u r e l y a t t a c h e d t o t h e e x t e r i o r a d o b e w a l l s u r f a c e b y n a i l s
o r s t a p l e s w i t h m i n i m u m p e n e t r a t i o n o f o n e a n d o n e - h a l f i n c h e s ( 1 2 " ) .
S u c h m e s h f a s t e n e r s s h a l l h a v e a m i n i m u m s p a c i n g o f s i x t e e n i n c h e s
( 1 6 " ) f r o m e a c h o t h e r . A l l e x p o s e d w o o d s u r f a c e s i n a d o b e w a l l s s h a l l
b e t r e a t e d w i t h a n a p p r o v e d w o o d p r e s e r v a t i o n b e f o r e t h e a p p l i c a t i o n
o f w i r e m e s h . N o a d o b e b r i c k s s h a l l b e u s e d f o r i s o l a t e d p i e r s , p o r c h
c o l u m n s o r w a l l s e c t i o n o f l e s s t h a n t w e n t y - e i g h t b y t e n i n c h e s ( 2 8 "
x 1 0 " ) . A m i n i m u m t w e l v e i n c h ( 1 2 " ) w a l l s e c t i o n w i l l b e p e r m i t t e d
b e t w e e n o p e n i n g s p r o v i d e d a c o n t i n u o u s l i n t e l o f c o n c r e t e o r t i m b e r
b e i n s t a l l e d s p a n n i n g b o t h o p e n i n g s a n d w a l l s e c t i o n . E x c e p t i o n :
e x t e r i o r p a t i o , y a r d w a l l s , e t c . , n e e d n o t h a v e P o r t l a n d c e m e n t c o a t i n g
( p ) F l o o r s a n d R o o f s . M a y b e c o n s t r u c t e d o f w o o d , t h e s i z e s a n d
s p a n s t o b e i n a c c o r d a n c e w i t h C h a p t e r 2 5 .
- 3
ORDINANCE NO. 10-80
(q) Allowable Floor Area. Shall not exceed that specified
under occupancy (Part III). Adobe construction shall be allowed
the same area as given in Table No. 5-C, Type V construction,
Column N.
(r) Partitions of Wood. Shall be constructed as specified
in Chapter 25, wood partitions shall be nailed to nailing blocks
laid up in the adobe wall or bolted through the adobe wall the
height of the partition, with one-half inch (2") S/ bolts at twenty-
four inches (24") on center with large washers or plates.
(s) Stop Work. The Building Official shall have the power to
stop work whenever adobes have not been thoroughly cured and shall
give prior approval to the use of any hardeners, stabilizers or
other so-called preservatives.
THAT the City Council finds and declares that it is necessary for
the immediate preservation of the peace, health and safety of this
City that this Ordinance take effect upon its passage and publication.
PASSED by the unanimous vote of all members of the City Council of
the City of Moab, Utah, this day of ! , 19 -2 .
APPROVED:
Marjorie R.. Tomsic, Mayor Protem
.I
ATTEST:
h Y! MClure, City Recorder