Park West CC(17)-CS180510 ,-•
TRENCH SAFETY PLAN
UTILITY LINES
ASTRA ZENECA
(IN AND AROUND 508 WRANGLER DRIVE)
COPPELL, TEXAS
FOR
HILL &WILKINSON
Note: Soil information indicates that a stiff clay (Type "B" soil) will be found on the
project site. The following applies:
H = 3/4 in stiff clay (Type "B" soil or better) and unweathered limestone.
H = 1 or greater in Type "C" soil.
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Trench Safety Plan for: MAVERICK CONSTRUCTION Pg: I of: 5
Job No: 9088 Trench Safety Engineering
Astra Zeneca F-6216
Date: 10 May 2018
(508 Wrangler Drive) 833 Rachelle Drive Red Oak
Scale: As shown Texas 75154 972-617-8370
Coppell, Texas
Design: R.H. Richard Haider P.E.
A
GENERAL NOTES
This Trench Safety Plan was prepared under OSHA Subpart P Excavations and
Trenches, 1926.652(b)(4)Option(4) & 1926.652(c)(4)Option(4). The plan deals with
the retention of soil by natural or manmade means. This plan can-not state the
where/how/when/choice/etc of the contractor's procedures. To do so would be
illegal. The contractor shall seek guidance from the Trench Safety Engineer when
unanticipated solutions are required.
THE FOLLOWING PAGE(S) ARE ALLOWABLE SHORING OPTIONS.
1. For all excavations of trenches, which will exceed a depth of five feet, the Contractors
trench safety procedures shall meet the current standards established by OSHA on
excavations, trenching, shoring, and confined spaces, all of which are incorporated
herein by reference.
2. These drawings assume all excavated areas remain free of water seepage or
intrusion. Excavations shall be inspected after every storm or other hazard-increasing
occurrence to assure the continued safety of the trench. The Contractor shall seek
guidance from the Trench Safety Engineer where needed.
3. When installing a support system, shoring will be applied by starting at the top of the
trench excavation and working downward. All cross beams, trench jacks, etc., will be
placed in a true horizontal position. Support system removal shall begin at the bottom
and proceed upward, performed from outside the trench.
4. Alternate design for use of steeper slopes of the use of supporting systems, i.e., piling,
cribbing, shoring, etc., may be submitted by the Contractor for evaluation by the
Trench Safety Engineer.
5. Slopes shown shall be the maximum unless changed by the Trench Safety Engineer
due to changing soil conditions. Slopes shown are for a short-term period. If
excavations are open for more than 24 hours, the Trench Safety Engineer shall be
contacted for evaluation.
6. Cohesive soils are classified by their unconfined compressive strength, as follows:
(psf= pounds per square foot; tons/sq ft = tons per square foot)
Type "A"...more than 3,000 psf (1.5 tons/sq ft)
Type "B"...more than 1,000 psf (0.5 tons/sq ft) and less than 3,000 psf (1.5 tons/sq ft)
Type "C"...less than 1,000 (0.5 tons/sq ft) that is not flowing or submerged.
Trench Safety Plan for: MAVERICK CONSTRUCTION Pg: 2 of: 5
Astra Zeneca Job No: 9088 Trench Safety Engineering
Date: 10 May 2018 F-6216
(508 Wrangler Drive) 833 Rachelle Drive Red Oak
Scale: As shown
Coppell, Texas Texas 75154 972-617-8370
Design: R.H. Richard Halder P.E.
Orr'
Note: Either sloped or benched is acceptable
���
~
10'
2' min. � max.
| `
Spoil
� -
�
` H
� 1
4' max. �
^
As Required
TYPICAL OPEN CUT CROSS SECTION
N.T.S.
Trench Safety Plan for: MAVERICK CONSTRUCTION Pg: 3 of: 5
Job No: 9088 Trench SafetyEngineering
Astra Zeneca � 6
Date: 10 May r'o�/
(508 ' 833 Rachelle Drive Red Oak
Drive) Scale: Asmhown
WranglerTexas75154 972-617-8370
CoppoU Texas -''
' Design: R.H. Richard Ha|dorP.E.
�
Spacing as per manufacture's tabulated data and limits
If tabulated data not advailable the following applies:
Spaced 0' to8' in unweathered limestone.
Spaced 4' o.c. in stiff clay (Type ^B^ soil) and weathered limestone.
Spaced 4' o'C. indry Type "C^ soil sheeted with 3/4'. 14'piyFinland
Birch, or14/8^ plywood, orapproved equal.
• �
_ .14.10'
1 f
|
"Standard" Hydraulic Shoring 2'
` 1O' nnX'
. Spoil
mismimmm
As per manufactures
tabulated data and limits,
�
2' max.
^
As Required
TYPICAL HYDRAULIC CROSS SECTION
N.T.G.
Trench Safety Plan for: MAVERICK CONSTRUCTION Rg: 4 of: 5
Job No: 9088 Trench Safety E -ineehng
Astra Zeneca � 0
Date' 10 May 2018 r�'� /
(508 Wrangler Drive) � 833 RmchnUe Dvp Rod Oak Scale: As shown Texas 75154 872^517'8J70
Coppell, Texas
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"�
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.
-:,~
� 10 ' max2' min, `
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Spoil
poil
moommimo
iiimmum
f--
4' max. /
As Required
Trench Box/Shield side wall capacity shall be equal or greater than 560 psf for
Type ^B^ soil and equal or greater than 800 psf for Type ^C^ soil. If there are
any changes is soil conditions. the Trench Safety Engineer shall be contacted
for evaluation.
Any manufactured/rated trench shield system. such as Manhole Rings. Modular
Shields, Panel Shields, etc, are included in this catagory.
Trench box capacity refers to uidovxaU capacity of bottom box when boxes are
stacked. If "closed ends'' are required, one acceptable method is by placing
3/4", or greater (or equal substitute) steel plate (width size may vary) against
spreaders of trench box. Other methods may be used with approval of the
Trench Safety Engineer.
ALTERNATE TRENCH BOX CROSS SECTION
Trench Safety Plan for: MAVERICK CONSTRUCTION Pg: 5 of: 5
Job No: 9088 Trench Safety Engineering
Astra Zeneca ��
Date: 10 May r'n�/n
(508 Wrangler Drive) ' 833 RDrive Red Oak
Scale: As shown ----
Texas 75154 972'017^8370
Coppell, Texas -'''
Design: R.H. Richard Halder P.E. .
,
AstraZeneca New Domestic Water Line Site Contacts
Maverick Utility:
Bryan Yule Mobile:817-800-4145
Hill&Wilkinson General Contractors:
Nick Houdek Mobile:214-681-6827
Fluor:
Craig LeCoure Mobile:406-546-1138
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