Park West CC(09)-CS 960606HIGHLAND FIRE PROT. TEl
214 341 4117
:14-341-4117
'% Emp. Ioyeel I_haLI not be permitted to
'~, work on O~o faces of sloped or benched
'.: ;xcavatfons et levels above other
~'employees except when employees at
; t~e lower levels am adequately
',~' protected from the haze~l of fair,Il. '
:. ailing or o[fd]n8 meter~a] or equipment.
Y Shield By,ems shall not be subjected
'~ loads exc~effi~ ~ole whl~ tho
'~ was d#~ned to
~ fit) 9hfeldd ,hall be ~otallod iff a
3' ma~er to res~ct lateral or o~er
~.j" bazer~ou~ movement o~ ~e shield In the
,~ e~enl of~e applbetfon
· '~ l~terai loade
· ~ ~m ~ h.ze~d o~ cave.~ when
~: entefl~ or e~tl~ ~e areas protect0d
~ (Iv} ~ployeee shall not be allowed
~ eMoldt when shield, a~ being ~stalled,
~moved, or moved vor~Hy.
: (2) Add/obnol mqu/~ment for
~cava~one of earth m.teHal to a level
~aot ~ater ~ ~/eat (.Ol m) below
,botto:= of a oh~eld =haU be pelleted.
but o~y ff ~e ,hleM Is desired ~
~e~et ~e fo~e= ~l~lated for ~e ~11
depth o~ ~ ~nch, ~nd ~em ~ ~o
~o~bie ~o~0 of soft ~om behind ar
)~low ~v bo~tom si ~e
ApPeU~ A~o Subp~ p
~,~o[l ~ ~k dopoutt$ based on elte and
{.l~ct~ ~nd ~mpojl,loh of the e~
~v~ o, Protects, for employee ~m
~ve-~. ~de ,ppen~ aba Ipplfee when
~ ~hofi~ ~r ex~viflon= l, desired
me~od of p~tocUon ~m ear,ins ~
~an~ ~ appon~ ~ 1o sub P of
~pendJx D. ~Jo Appen~x lisa applies If
,~ance With ~ ~q~r~men~ set f~
Posblt' brand fax transmittal memo 7671 eof pagan · ~
'"'
a atds
sslfloatlon
r.4~dcult=e
· ' ~ ~oheme: and
,BS~121.
Cemented ~/ me=n; e soft
par~clee are held to~e~ by ~ cbeml~l
~ond-sJze oampJe ~a~ot be crashed ~to
powder oF individual soil ps.cleo
pre,m~e. -
CoAe~ive Jol/means clay (~e ~alned
earl}, or soft wf~ a hf~h day ~ntent. which
has cohesive s~M~. Cohes;vo soft d~s not
Jun o,.,-%,96 15:45 No.O04 P.O!
Iober gl. 1080 / Rules and Retpdation8 4596__~
cases, silty clay loam and Bandy ;lay loam.
Cemented soils such es callche end hardpan
are also considered Type A. However. no soil
is Type A fi:
(f) Tho soil is fissured; or
{au ~o ooil 1~ subject to ~bta~on
heavy ~a~ pile dfl~nL or similar effeetg
or
0il} ~e earl ha, been pre~ous~ distu~&
or
(tv} The soil Is part of · sloped, layered
system where the ]aye~ dip tats the
excavaUon on e slope of'fo~r horizontal to
aaa v.rtlca) (elf:tV} o~ ~ater. or
crumblo, cea be exaavated w'lth vertical (v} The material lo subject to other factors
~d,eslopes. and Is plantlo when moist ~at .woul~ z~q, ulre it to be classified as, leas
?o,nesiy.e. soil Is he. rd to breck up wh;;n &'y, ~'-"--.----~ __ A
an? exh~bl, ts sl~flc,~nt aohssfon when /- ~,~.e.~ re. eons:. ~ ~'~.
· Coho,Jvc soil, cl,d, 10, ,n. .
sanay clay shiv clay clay and o~a compress, tva srr~n~t~ eter ~an (
~z7 ~; means ooiI t,b&t does not exhibit / ~-.~.!. ~_m m~. men ~.o t~ ti,14 kPa~ or
visible sl~ns of moisture oontant. / {IU. Granul~ eobeslonles's soils lncl~dln~: \
· r{,,u~ ?sans a soil mate~lel t~et he~ · / ~n~,ll~_a~__~'eve! ~'",imll~ to. crushed ~ck}. silt.
~,enaoncy to steak slo~ dermite phnes of [ _~;..t to.am..sandy team arid. tn ~ma oa.e~.
fracture with little resistance or a material \ oll~._clay loam and sandy clay ]o~m.
f~at exhibits open ~acha. sn~b as ~enslon ~, ,(!ii.} Pmvl. o. asl¥ disturbed soils exaept ~o,~
crac~. I~ ,n exposed eudece. /~ w.M.c~ wouM ol.%rwIse be classed ee'f~pe C L
,. ¢~nu/~.,o/./ma. ese ~'aveL sand. or ,fit,/f salt. . .
tcoa~e grimed soil] wi~ ]ltt]s or no olay '/ flvl Soil thai meets the ~n~oz~ed .
co, tent Granular sou bas no ooheslva / compresst~ strengt~ or cementation
sLtensth. Some moist ~'aaulez sous exklbi[ te_qulrements for TTpo A~ b,t to fissured m'
app~Lr~flt cohesion. CranuJa~ soo earmot b~. evb]eat to 'dbreUom or /
molded when molst end onu~blea easily ~ {.v)_Dry rock thst Is not stable; et
whendry. ~ _ {vt}Meterialthellspertofeelo ed,
di~:,~:~.me.a, ns two_ er more ~, l_a.?redjsyst~m w,hare ~o layers dip Into tho
~r m~,~nt sou or ~ 17POS arra~'~ld .exeavauon o~. stops I~sss steep t~an lout
planes in t~ck or shale am e°nsideted '[t~a material would oth be cla si
' p. o s aohe$1veaol] ~ Cob,lye earl wfl~ an
can eatlly be shaped Into a bali and rolled compressive stre~th of 0., td lea kPal or
loss; or
Into small dl~tmeter threads before cr~mblL~.
lvlolel Jlran~d~t soil ~at
cohesive materl~ ~! e~btt st~8 of
~heslon be~e~ ps.cica.
allows ~e eeo t~ be defo~ed or molded
~hou~ crscklr~f, er ~opre~eble vol~e
voMo a~ ~Hed ~ wat~.
~ot ~qut~ ~ow. ~e~o~
~me.~ su~ ag I ~cket ~ne~me~r or
Sheer vane.
~otl clg$~/fi~on *y$~m me~o, for
pu~ose of t~ls 3ubpa~ a me~od of
~tego~l~ soft ~d ~ ds~sl~ ~ a
hJer~hy of 8table Ro~ ~ ~ ~e B,
end ~ C ~ de~io~ o~er of stability.
~e categories a~ dete~ed based off an
..chatecte~sfl~ of ~e dapples and
b'~ble ~ mom~ nm~e] ~d m~o~
tootler that ~n be ~vat~ ~ v~]
~lde~ and ~atn ~tact wh~. ~ed.
~o~~//me~+ soft w~
vnde~ater o~ la ~e
7~e~ me~ ~bealve ~fls ~ an
pet Sgua~ foot {leo (1~
~xample~ of ooheeive ~e
~e7, san~ c[.y. ~ loam ~d. ~ some '
(U) Creeuhu- soils Including IreveL Band.
and loamy send; or
(iii} 8ubme~ed sou or soil l%om whloh
water te ~ely seepl~ ~
(iv} Submerged ~ ~at~e ~t stable,
(vi Materiel ~ a slgpe~ lay~d system
~he~ ~a leye~ ~p ~to the ex~v~U~
slo~ of ~o~ horizeutai to ~e
(4H;IV) oF steeper.
In compression. It ~n ~ dete~ by
labomto~ te~U~, ~ #tfmat~ ~ ~e field
ua~ e p~et ~ne~mat~, by ~b
pene~eUon teBtt, and O~er methyl.
W~t ~1 means ~fl that ~ntal~
s~iflesntly mo~ mols~ ~n moist
but tn su~ a m~e of values ~nt ~beelve
material will simp at ~in to flow wh~
vibrate. Gr~ular materiel that w~d
e~blt ~healve p~pe~e~ when meier wlll
Iaaa ~cJe ~hesfve p~lol wh~ weL
a.d ~ du~M~. ~ soil end ~k
~a]i b~ olassifled by ~ ~mpetent
8table go~, ~ A, ~pe B, or ~ C In
a~orJanoe wltb ~e deflnltt~ set fotth In
para~ph (b) of ~ls appendix.
(2) floa/a o/claaMfi~tl~. ~e
based on ~e ~s~ of et least one vi, ua{ and
df least o~ manual a~Ty$1s. Such analy~e$
..!
HIGHLAND FIRE PROT. TE' 214-341-4117 Jun 06,96 15:47 No.O04
and Re~latlon~ 4596?
' ' Unwup~Yetllcal]~ S ~w ~
~P~ w~oh unsupported vet~cally aided lower portloae shell ~ave m
max~t~ aUowmble mlo~ of 1;t mad · maximum vertical ~lde of IR leal
Unsupported Vertically Sided Lower Portion--Maximum :la Feet in DePth
All excavaUonw ~0 feet or Jess in depth w~ch hive vertically wfded lower portions Ihat ate supported or able]dod shall have a ma:cfmurb
atlowable elope or ~:1. The support or shield system mas! extend et least 28 inches ibove the top of the verUcal aide.
..... __ ~ ,, )/~'
P .03
8uported or Shielded Ve~r,m]Jy Sided Lo~er Portion
4. AU other staple slope, competed slope, ~ vertfcell¥ aided lo.,et police excavetJotts sl~dl be In accordance eth lbs osha. options
permitted under 1 la,0~2fb).
I~2.Z Excavations Made in Type B 8o1! .
1, Ail simple slops excevatfona gO feel or less In depth shill hive a maxLmum ~dlowable slol~ of 1:1.
HIGHLAND
FIRE PROT. TE&~Rld-3al-dll7 Jun 06,96 15:~6 No.OOd P.02
Feclm~, ,~,~,/ Vet. 5¢, No. 209 /, ,'~esday. October 31, 198g/ Ru~es and Rei~atlo-_e ~BL~D_U
TABLE
MAXIMUM ALLOWABLE SLOPES
SO'IL OR ROCK TYPE
STA6LE ROCK
TYP£ C
MAXIMUM ALLOWABLE SLOPES
FOR EXCAVATIONS LESS THAN ZOFEETI
n_r_r_-_ OJ
vErTIcAL
NOTES:
· 8L'nple BIopo--Oenoral
~' l~cepbon: Sim]pie slope exoevitlo., which ire open ~,i ho~rs or less (sho~ ~rm) end which ere ~ feel or less ,n depth shell have i
, u~xlmum 8~ioweble slope o! ~:~.
1. Number~ shown in parentheses next to maximum a11o~able slopes are angles expressed in
degrees from the horizon, tal. Angles have been rounded off,
2. A short-term maximum allo~ah]e slope of l/2tt:lV (63
excavations in Type A soil that are 12 feeL (3.67 m) or less :l.n depth.
Short-term maximum a]lo~able slopes for excavations gteate: than
feet (3.67 m) tn depth ~hatl be 3/&H:~V
3. Sloping or benching for excavations greater than Z0 Feet deep shall be designed bx a registered.
profes$tona~ engineer.
Slope ConJlfumtaoae
[AL1 slopes elated below mm In t. be Aorlr. ont.l to vertical ratio)
1. ~1 simple o)ope excmvatJon ZO lest or Ieee in depth sheU hive a maximum al~wable slope of %:1.
20' Ma [