Dratnage Pit / Trench Cover

Products Details

Dratnage Pit / Trench Cover 1. Grating trench cover used in walkway, carriageway, courtyard or other constructions. Used as cover for drainage trench, wireway, subway, air pit, etc. Hot-dip-galvanizing for surface treatment. 2. Grating trench cover composed by fixed fram & removable grating cover. It can be noted as GT & GU in terms of their different structures. 3. Grating pit cover used in catch basin, sand sediment trap, draining well, & sink hole for road, park & other civil projects. It’s generally designed as the evertile & its start-stop angle is 110°. The grating with pin joint is not only good to guard against theft but also simplify the construction procedure.  Class of Loading for Drainage Trench/Pit Cover

Class of Load

Fully Laden(kg)

Back Single-wheel Load(KN)

Wheel-pressure Area a×b (mm2)

T-25

25,000

100

200×500

T-20

20,000

80

200×500

T-14

14,000

56

200×500

T-6

6,000

24

200×240

T-2

2,000

8

200×160

Learn Steel Grating

Steel Grating Standard

Steel Material Standard Hot galvanizing Standard
China: YB/T4001.1-2007 China: GB700-2006 China: GB/T13912-2002
U.S.A: ANSI/NAAMM U.S.A: ASTM(A36) U.S.A: ASTM(A123)
U.K: BS4592 U.K: BS4360(43A) U.K: BS729
Australia: AS1657 Australia: AS3679 Australia: AS1650
ggb7 1. Bearing bar pitches may be 12.5 to 15, 20, 30,32.5,34.3, 40,60mm,of which 30mm & 40mm are recommended.  2. Cross bar pitches may be 38,50,60, to 100mm, of which 50mm & 100mm are recommended.  3. Sign of the shape of bearing bars. F - Plain style (may be omitted in the symbol of steel grating); S - Serrated style; I – I-shape style  4. Sign of surface treatment. G - Hot galvanizing (may be omitted in the symbol of steel grating); P - Painted; U – untreated   FIELDS OF APPLICATION : 1. Light chemical industry/Petro-chemistry/Machinery industry/Textile chemistry/Port engineering 2.Oil and grease chemistry/Agriculture husbandry/Horticulture/Steel industry/Waste disposale 3.Food processing/Aquatic breeding/Fertiliazer industry/Phamaceutical industry/Parking lots 4.Cement plants/Oil refinery/Mining and refinery/Power plants/Public utilties 5.Marine engineering/Shipbuilding/Construction material industry/Defense projects/Airport projects 6.Water plants/Sewage disposal/Paper and pulp industry/Construction industry/Transportation industry/Automotive industry COMMON USES OF GRATING : Flooring  Catwalks  Mezzanines/decking  Stair tread  Fencing Vault bin floors  Ramps  Docks  Trench covers  Window and machinery safe guards  Entilation screens  Storage racks  Suspended ceiling  Drainage pit cover  Wash racks  

Type of Steel Grating

Comparison of Feature:
 ggb2  ggb3  ggb4

Plain:One of the most widely used grating, available for flooring, sidewalk, dranage pit cover, stair tread, etc.

Serrated:Better non-skid property & safety comparing to plain grating.

I-shape:Lighter, more economical and practical comparing to plain grating.

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