{"id":4611,"date":"2026-10-22T06:23:47","date_gmt":"2026-10-22T06:23:47","guid":{"rendered":"https:\/\/www.ggsteelstruct.com\/projects\/shenshan-750kt-grain-reserve\/"},"modified":"2026-10-22T22:14:08","modified_gmt":"2026-10-22T22:14:08","slug":"shenshan-750kt-grain-reserve","status":"publish","type":"page","link":"https:\/\/www.ggsteelstruct.com\/id\/projects\/shenshan-750kt-grain-reserve\/","title":{"rendered":"Cadangan Gandum Shenshan 750 kt"},"content":{"rendered":"\t\t
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  1. Home<\/a><\/li>
  2. Projects<\/a><\/li>
  3. Shenshan 750 kt Grain Reserve<\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t\tCase study \u00b7 Grain storage<\/span>\t\t\t\t<\/div>\n\t\t\t\t
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    Main contractor: CSCEC 5th Bureau (north zone)<\/span>Tandem lift, 2 \u00d7 600 t cranes<\/span>Q355B<\/span><\/div>\t\t\t\t<\/div>\n\t\t\t\t
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    Shenshan 750 kt Grain Reserve: A 47 m Trestle Lifted 50 m High<\/em><\/h1>\t\t\t\t<\/div>\n\t\t\t\t
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    Steel conveyor trestles and roof steel for a 750,000 t national grain reserve behind Xiaomo Port in the Shenzhen-Shanwei Special Cooperation Zone. The Lot 3 trestle, 47 m long, was lifted in one piece by two 600 t mobile cranes.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t

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    750,000 t<\/strong>Grain storage capacity<\/span><\/div>\t\t\t\t<\/div>\n\t\t\t\t
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    47 m<\/strong>Trestle span<\/span><\/div>\t\t\t\t<\/div>\n\t\t\t\t
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    50 m<\/strong>Trestle height above grade<\/span><\/div>\t\t\t\t<\/div>\n\t\t\t\t
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    223,000 m\u00b2<\/strong>Gross floor area<\/span><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    \n\t\t\t\t\t01<\/span>Project facts<\/span>\t\t\t\t<\/div>\n\t\t\t\t
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    Storage, transfer and processing on one port site<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    The Shenshan grain reserve combines strategic storage, port transfer and emergency processing on a 350,000 m\u00b2 site behind Xiaomo Port. It uses shallow-round silos, vertical silos and low-temperature warehouse blocks, linked by enclosed conveyor trestles that carry grain between the berth, the silos and the processing buildings.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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    Guiguan fabricated steel trestles, trestle support towers and roof steel for the storage buildings. The highlight was Lot 3: a 47 m trestle span set 50 m above grade between two silo groups.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t

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    \n\t\t\t\t\tSilo and trestle zone during construction<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    Item<\/th>Detail<\/th><\/tr><\/thead>
    Owner<\/th>Shenshan grain reserve authority (state grain reserve project)<\/td><\/tr>
    Main contractor<\/th>China State Construction 5th Engineering Division (north zone)<\/td><\/tr>
    Location<\/th>Behind Xiaomo Port, Shenzhen-Shanwei Special Cooperation Zone, Guangdong<\/td><\/tr>
    Building type<\/th>Grain silos, warehouses, conveyor trestles, processing plant<\/td><\/tr>
    Site \/ GFA<\/th>350,000 m\u00b2 site \u00b7 223,000 m\u00b2 GFA<\/td><\/tr>
    Capacity<\/th>750,000 t of grain<\/td><\/tr>
    Trestle<\/th>47 m span, 50 m elevation, enclosed box-truss gallery<\/td><\/tr>
    Structural steel<\/th>approx. 3,800 t across trestles, towers and roofs (estimated)<\/td><\/tr>
    Steel grades<\/th>Q355B; Q355C for exposed coastal members<\/td><\/tr>
    Our scope<\/th>Detailing, fabrication, trial assembly, coating, delivery, lift engineering support<\/td><\/tr>
    Program<\/th>Start December 2022 \u00b7 operation planned end 2025<\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Tonnage and member data from fabrication records; areas and dates from the owner and main contractor.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    \n\t\t\t\t\t02<\/span>The challenge<\/span>\t\t\t\t<\/div>\n\t\t\t\t
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    A long, light, high span in a coastal wind zone<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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    Conveyor trestles are long and slender. At 50 m above grade on the South China coast, wind and lift stability governed more than grain load.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    47 m span at 50 m<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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    The trestle bridged two silo groups with no intermediate support. It had to be stiff enough for conveyor alignment and light enough for a two-crane lift.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Typhoon exposure<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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    Coastal Guangdong design wind pressures, with the gallery cladding adding sail area to the truss.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Live silo interfaces<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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    Trestle ends sat on silo-top structures and towers with tight bearing tolerances and thermal movement.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Lift stability<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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    A long box truss must not twist or overstress during a tandem lift. Lifting points and temporary bracing were part of the design.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Marine corrosion<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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    Salt-laden air near the port called for a heavy-duty coating system and sealed box members.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Dust and fire<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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    Grain dust requires smooth, cleanable steel surfaces and explosion-relief detailing in galleries.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    \n\t\t\t\t\t03<\/span>Engineering solution<\/span>\t\t\t\t<\/div>\n\t\t\t\t
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    A box truss built as one piece, lifted as one piece<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    The trestle is a rectangular box truss: two vertical Warren trusses for the sides, with top and bottom chord bracing forming a closed tube for torsional stiffness. Chords are welded H-sections; diagonals and verticals are H and tube sections. The conveyor runs on the bottom deck and the gallery is clad on a light frame.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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    We fabricated the trestle in transportable segments and trial-assembled the full 47 m length in the yard, surveying camber and diagonals before match-marking. On site it was bolted together at ground level, then lifted by two 600 t mobile cranes. Lifting lugs were designed at the panel points so each crane took its share without local buckling. One end bears on a fixed bearing, the other on a sliding bearing to release thermal movement.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    \n\t\t\t\t\tLong-span truss in shop trial assembly<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    Member \/ detail<\/th>Section & grade<\/th>Detailing note<\/th><\/tr><\/thead>
    Trestle chords<\/th>Welded H 400\u00d7400 to 500\u00d7400, Q355B<\/td>Bolted splices at segment joints, match-marked<\/td><\/tr>
    Diagonals \/ verticals<\/th>H 250\u2013350 and tube \u03a6219\u2013299, Q355B<\/td>Gusset connections, seal-welded tubes<\/td><\/tr>
    Plan bracing<\/th>Angles and tubes, Q355B<\/td>Closed tube action for torsion during lift<\/td><\/tr>
    Support towers<\/th>Box columns 600\u00d7600, Q355C<\/td>Four-leg braced towers, HSFG bolted<\/td><\/tr>
    Bearings<\/th>Fixed + sliding steel bearings<\/td>Sliding end releases thermal movement<\/td><\/tr>
    Lifting lugs<\/th>Plate lugs t = 40\u201350 mm, Q355C<\/td>At panel points, 100% UT, removed after lift<\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    \n\t\t\t\t\tFabrication & QC, Guangdong base<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    \n\t\t\t\t\t04<\/span>Fabrication & QC<\/span>\t\t\t\t<\/div>\n\t\t\t\t
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    Full-length trial assembly before shipping<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    The full 47 m trestle was assembled in the yard and surveyed for length, camber, diagonal difference and bearing positions. Lifting lugs and their welds received 100% UT and MT and were load-checked against the lift plan. Coating used a C5 marine system: Sa2.5 blasting, zinc-rich epoxy primer, epoxy intermediate and polyurethane top coat, about 240 \u00b5m total DFT.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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