standard drawing for pit

 

 

rN NOTES:
CP 1. SCOPE: This Standard Drawing provides details of cast insitu roadway type gully with channel lip in line and
using the precast anti-ponding inlet unit detailed here.
spe aye , , This standard drawing shall be used for the cast in-situ gully pit depth of maximum 3000.
Kerb and channel 1000 transition 1350 1000 transition Text “DUMP NO WASTE — FLOWS TO CREEK’ Pit sizes greater than the sizes shown on this drawing shall be a project specific design.
as specified. Refer 40 high letters, imprinted 5 into concrete Constructability and accessibility of deeper pits shall be considered in the design.
ranean vewing Refer Note 14 for additional design requirements for pits deeper than 5000.
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| I IY 2. PRECAST COMPONENTS shall be in accordance with MRTS72.
I I Precast concrete inlet units shall be approved by the Administrator before use in accordance with MRTS72.
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3. CONCRETE ROADWAY TYPE GULLIES shall be in accordance with MRTSO3.
aaa 4. DESIGN LIFE: 50 years

 

 

 

 

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= Elow Flow a 5. DESIGN LOADS FOR CAST INSITU PITS (all pit sizes and depths):
! i 7 \ e—1— Kerb and channel fling onchors Soces — Traffic loads and traffic load surcharge shall be in accordance with AS 5100.
1 t m as specified. Refer Anchors shall not be — Load factors and load combinations shall be in accordance with AS 5100.
| oe prewing placed on the lintel — Structural design shall be in accordance with AS 3600.
Channel lip in line Reference point Concrete apron 150 thick, Manufacturers’ identification 6. PRECAST INLET UNITS: Reinforcement shall be provided by the designer to obtain the strength required to
continuous through gully (line and height) kL transition crossfall to suit grate to be shown on this face pass the specified test criteria.
For precast lintel units the load detailed in TABLE A shall be applied to each location with separate tests
TYPICAL PLAN ISOMETRIC VIEW at each location. Acceptance criteria for load testing to be as per AS 1597.1.
INSTALLED ANTI-PONDING INLET PRECAST ANTI—PONDING INLET UNIT Precast gully shall be an approved design in accordance with MRTS72. Design shall proved by load testing.
P t The load detailed in Table A shall be applied with separate tests at each location as marked. Acceptance
anti_ponding Barrier kerb 150, or criteria and method for load testing shall be as per AS1597.1
Concrete apron inlet unit Semi mountable kerb 125 — The lintel unit shall be placed on a compacted confined sand bed (400mm depth max) during test for

lf separate components of lintel and base unit with dowel connection is proposed, the dowel connection

 

  
 
   

transition crossfall 30 30 1 f kerb Precast Reference point base. Sand bed is not required for test on lintel.
to suit grate TT \ ~ J. Op oF ker! inlet unit (line and height) A single casting for the Lintel and Base Unit is preferred.
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Channel {Aimer | g| e | __Channel_| Invert 300. lap —> shall be designed by precaster’s designer and pass the test criteria. Minimum of 4-M16 class 8.8 bolts
ro, > f-— | _ _Y_\ y—__ 15-4 7 typical shall be provided for this connection.
ap a | Ferrules in the supporting structure shall have 100 minimum embedment and 45 kN minimum anchor
. — | bt Manufacturer's Base of __ | | = design capacity. These minimum anchor requirements are to meet the kerb horizontal design loads in
Provide 10mm mortar 1: 3 f identification channel i I accordance with Clause 11.1 of AS 5100.2.
joint between gully pit and ! | . I bt ! \| 83
precast inlet units 1501 950 b| 150 shown on vertical I 2 Ve | | 2 7. CONCRETE shall be in accordance with MRTS70.
€ I Py inside face I x \ I ws Minimum grade of concrete and cover to reinforcement shall be as shown in the table below.
> & I i QO si92 Wy I \, i Exposure classification B1 to AS 3600.
S |
E t U1 ts! | t 1 Outlet - Mini t
s I 4 inimum cover to
3 8 i \ — 45 cover i | a 50 fol et I culvert Component Minimum concrete grade reinforcement to AS 3600
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3 i Ls I typical L I g Watney Cast in-situ pit N32/20 40 *
. WA Cast in-situ channel N32/10 -
Cast insitu 3 2-layers SL82 bent up Gully pit hsd 835 sd - 7 "
gully pit = sides 500, placed centrally v t Precast inlet unit N50/20 20
im siep SECTION SECTION (“B «Us i
— Using standard formwork and compaction
SECTION ALONG CHANNEL INVERT ry, ** — Using rigid formwork and intense vibration. In lieu of intense vibration,
approved Super Workable Concrete may be used.
>, All exposed edges shall have 19 x 19 chamfers unless shown otherwise.
eZ Precast lintel unit to suit base unit, 8. REINFORCING STEEL shall be in accordance with Standard Drawing 1044, and MRTS71 and AS/NZS 4671.
1330 refer Note 6. Mesh Grade D500L. All reinforcing steel shall be ACRS certified.
° ° For all other details refer SECTION D . A
~ = TABLE A — TEST CRITERIA \- A __ 1 Single costing type 9. STEELWORK shall be fabricated to the requirements of MRTS78.
e | I Steel plate to Grade 250 UNO to AS/NZS 3678. All steelwork shall be hot dip galvanised to AS/NZS 4680.
1200, Lifting anchor, Refer Note 6 . i . / Pg /
/ | tefer Note 11 Anchor bolt connection. 10.WELDING: Structural Steel welding shall be to AS/NZS 1554.1.
wo Tr r Criteri Vertical TYPICAL PLAN — LINTEL UNIT Minimum of 4—connections. All welds, except location tack welds, shall be SP category.
g a 4 meria test load Refer Note 6 Welding consumables shall be controlled hydrogen type:
—f | QO Vertical load Proof load SOKN re ys G493 to AS/NZS ISO 14341-B or 1493 to AS/NZS ISO 17632-B.
test area, I I Reinforcing Steel welding shall be in accordance with Standard Drawing 1044.
8 i 200 X 150. Ultimate load 9OkN r ° Precast base unit to suit lintel unit, 11.LIFTING ANCHORS shall be designed and installed in accordance with MRTS72.
= Refer Note 6 ' refer Note 6. Lifting anchors shall be an approved product.
i | on il other detals refer SECTION D 12.GRATES, COVERS AND FRAMES shall be Class D to AS 3996 and comply with MRTSO3.
. iz) 9 9 YP Grates and covers shall be tested for BPR to AS3996.
as x | ] ! Vertical load test area, Hinged grates are to be provided with a positive mechanical retainer to secure them firmly in place when
i I I 200 X 150. Refer Note 6 in the open position.
Lo Guly grate with frome bo Tk in the open posit - /
refer Note i I 13.Provide 10mm mortar (1 cement: 3 fine sand) joint between gully pit and precast inlet units.
PLAN Lic 14.DESIGN REQUIREMENTS for pits deeper than 5000
PRECAST ANTI-PONDING INLET UNIT TYPICAL PLAN — BASE UNIT — Design life 100 years for pits; other concrete components 50 years
— Minimum exposure classification B2 to AS 5100
Refer Note 6 380 7 x 10 steel plate, anchored with studs of ALTERNATIVE DETAIL FOR SEPARATE LINTEL AND BASE UNIT — Minimum concrete strength 40/20 for pit; and N32/10 for channel
for reinforcement 25 12 dia steel round bar x 300 long (galv), .
R 5 studs welded 150 from the end, then at Anchor bolts and ferrules for connection between lintel and base unit. — Cover to reinforcement to AS 5100
250 crs, bend end studs to maintain cover Minimum of 4—connections. Refer Note 6. Refer Note 5 for concrete design requirements.
wo After connection is made, fill recess using epoxy grout and apply 2—coats tn mil A
8 & a 3% of surface tolerant epoxy to top of recess, 100. C100 area PP 15.DIMENSIONS are in millimetres unless shown otherwise.
g B 8
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sz) 449 Eytent of nt! zi Department of Transport and Main Roads
N xtent of lintel
when cast separate The purpose of This Standard Drawing is to ©The State of Queensland (Department
to base unit 4 provide typical standard details. CONCRETE GULLY of Treepert end ven fea) 8
150 Gully grate frame | 150 The fitness for purpose of these details for a and https: /creativecommons.org/licenses/by/|
~~ cast into concrete . . . ee Queensland | 40/
Ferrules in supporting structure. Refer SECTION D specific project shall be designed and certified Government
1135, Refer Note 6 Single casting for by on RPEQ. ROADWAY TYPE AS Standard Drawing No
all other details y wage . .
SECTION (D) SECTION ALTERNATIVE DETAIL FOR The details specific to the project location shall CHANNEL LIP IN-LINE Not | 4 59
SINGLE CASTING SEPARATE LINTEL AND BASE UNIT be shown on the project specific drawings. ANTI-PONDING s 5
cale Date 7/2024
Refer Note 6 D |