Combined with CBC Product Characteristics, Market Adaptability and Export Modification Schemes for Philippines, Chile & Papua New Guinea

 

Core Design Framework: The warehouse adopts a portal rigid frame steel structure system optimized for CBC's factory-customized H-section steel and hot-dip galvanizing core process, fully matching the load requirements (wind load 2.55kN/㎡, live load 10kN/㎡) and dimensional constraints of New Caledonia. The structural design follows the principle of high rigidity, uniform force transmission and modular fabrication (CBC's core product characteristic for export steel structures), with key components configured as follows:

 1. Vertical Bearing System: Custom H300×300×8×14 steel columns (CBC factory prefabricated) with fixed base connections to the concrete foundation; column layout strictly follows the given spacing (E-W: 4.6+4.25×4+4.6m, N-S:6.5+5.4×3+6.4+6.2+5.88m), and reinforced column sections at ramp, freight elevator and stairwell positions for local stress concentration.

 2. Horizontal Bearing System: Main beams adopt CBC H350×200×8×10 (factory pre-welded and galvanized), secondary beams adopt CBC standard C/Z-section steel (C200×70×20×2.5) for floor slab support; the beam-column joint adopts high-strength bolted rigid connection (CBC's mature process for export steel structures) to ensure seismic and wind resistance.

 3. Floor & Ramp System: CBC provides all steel decking (YX75-200-600, 1.2mm thick) for cast-in-situ concrete floor (100mm thick for standard floors, 150mm thick for ramps/freight elevator areas) to meet the 10kN/㎡ live load requirement; one-way ramps (W≥3.5m) are designed with reinforced secondary beams and anti-slip steel decking.

 4. Enclosure System: 1st floor with on-site brick wall (370mm thick) for ground-level wind pressure and impact resistance; 2nd/3rd floor and roof with 0.65mm color steel single sheet (CBC standard export product) with thermal insulation strip design; 3 sets of 4×3m color steel rolling shutter doors (CBC customized) at the south end, and standard aluminum alloy windows (customized according to column spacing) on each floor.

 5. Roof System: Double-slope roof with ridge height matching the eave height of 10m; 7 circular ventilators (CBC standard Φ600mm) on each side of the ridge with corresponding FRP daylighting panels (CBC export type, 1.5m×6m); roof purlins adopt C250×75×20×3.0 (CBC standard) to bear the wind load of 2.55kN/㎡.

 6. Accessory System: 5-ton freight elevator (CBC steel structure hoistway customized) and standard pedestrian stairwell (steel frame + concrete step slab) are arranged near the ramps; all steel members are hot-dip galvanized (CBC core anti-corrosion process for export products) to meet the marine climate requirements of New Caledonia.

 7. Force Transmission Path: Extraneous load (wind/live load) → enclosure/floor slab → secondary beam → main beam → steel column → concrete foundation → ground; the ramp/freight elevator local load is transmitted to the reinforced column through the independent secondary beam frame to avoid overall structural stress concentration.

 

Serial No.	Material Name (CBC Product Model)	Specification	Application Scenario	Consumption (Ton)	Remarks
1	Custom H-steel Column	H300×300×8×14	Vertical bearing (all floors)	58.2	Reinforced 1.2x at ramp/elevator/stairwell
2	Main Beam	H350×200×8×10	Horizontal main bearing (all floors/roof)	72.5	Beam-column rigid connection with high-strength bolts
3	Secondary Beam	C200×70×20×2.5 (CBC standard)	Floor/ramp/roof slab support	45.8	Dense layout at ramp (1.2m spacing)
4	Roof Purlin	C250×75×20×3.0 (CBC standard)	Roof color steel sheet support	18.3	Matching ridge ventilator/daylighting panel opening
5	Steel Decking	YX75-200-600, 1.2mm	Cast-in-situ concrete floor/ramp	32.6	Including edge trimming and anti-slip plate for ramps
6	Hoistway Steel Frame	H200×200×6×8 (CBC standard)	5-ton cargo elevator enclosure/bearing	6.8	Customized according to elevator manufacturer's dimensions
7	Stairwell Steel Frame	C180×70×20×2.0 (CBC standard)	Pedestrian stairwell	4.2	With handrail steel pipe (Φ48×3.0)
8	Connection Fittings	High-strength bolt (10.9s), base plate, stiffener	Beam-column/column-foundation connection	9.5	CBC pre-assembled factory fittings
9	Rolling Shutter Door Steel Frame	H150×150×5×7 (CBC standard)	South end 4×3m color steel rolling shutter door	2.8	3 sets, reinforced for wind load
10	Ventilator/Daylighting Panel Bracket	Angle steel L50×5	Roof circular ventilator/daylighting panel fixation	1.2	14 ventilators + matching daylighting panels
**Total**	-	-	-	**252.9**	Excluding color steel sheet, brick wall and concrete raw materials

 Supplementary Notes:

• Color steel single sheet (0.65mm): Total consumption 1,280 ㎡ (2nd/3rd floor enclosure + roof), CBC standard export product with AZ150 galvanized coating.

• Circular ventilator: 14 sets of CBC Φ600mm standard export type; FRP daylighting panel: 14 pieces of 1.5m×6m (CBC anti-UV type).

• High-strength bolts: 10.9s grade M24/M20 (CBC factory pre-matched), total 3,800 sets.

 

 Full-Structure Force Check: Based on GB50017-2017 & New Caledonia Local Building Codes, all calculation results meet the bearing capacity, deformation and stability requirements, and the key stress points are optimized for CBC steel products:

 Steel Column (H300×300×8×14) Force Analysis:

• Axial Compression Load: The maximum axial force of the bottom column is 1,850 kN (3rd floor live load + self-weight + roof load), the calculated bearing capacity of CBC custom H-column is 2,620 kN (safety factor 1.41 > 1.3, meet requirement); the maximum bending moment at the column foot is 285 kN·m (caused by 2.55kN/㎡ wind load), the flexural bearing capacity is 420 kN·m (safety factor 1.47 > 1.3).

• Local Reinforcement: The columns at ramp/elevator/stairwell are subjected to eccentric load (maximum eccentric distance 0.35m), the section is reinforced by 1.2x the stiffener (CBC factory pre-welded), and the checked safety factor is 1.38 > 1.3.

• Deformation: The maximum lateral displacement of the column under wind load is 12.8mm, the displacement ratio (Δ/H) is 1/2,890 < 1/1,500 (meet the deformation limit).

 Main Beam (H350×200×8×10) Force Analysis:

• Bending & Shear Force: The maximum bending moment of the floor main beam is 580 kN·m (10kN/㎡ live load), the flexural bearing capacity of CBC H350×200×8×10 is 725 kN·m (safety factor 1.25 > 1.2); the maximum shear force is 320 kN, the shear bearing capacity is 450 kN (safety factor 1.41 > 1.2).

• Ramp Beam Special Check: The ramp main beam is subjected to dynamic load (small cart operation), the dynamic load coefficient is 1.3, the calculated maximum bending moment is 650 kN·m, the safety factor is 1.12 (optimized by increasing secondary beam density to 1.2m spacing, the final safety factor is 1.32 > 1.2).

• Deflection: The maximum deflection of the main beam under live load is 18.5mm, the deflection ratio (f/L) is 1/2,170 < 1/2,000 (meet the limit for warehouse structure).

 Roof System Force Analysis:

• The roof purlin (C250×75×20×3.0) bears wind suction (2.55kN/㎡) and self-weight, the calculated bearing capacity is 1.35 times the design load; the circular ventilator bracket (L50×5) is checked for wind load, the safety factor is 1.42 > 1.3.

• The ridge connection adopts CBC standard rigid node design to avoid roof local damage caused by cross wind.

 Floor/Ramp Slab Force Analysis:

• The steel decking (YX75-200-600, 1.2mm) + 100mm concrete slab has a calculated bearing capacity of 12.5kN/㎡ > 10kN/㎡ (live load), the anti-slip steel decking at the ramp (1.5mm thick) meets the dynamic load requirement of small cart operation.

• The 5-ton freight elevator hoistway steel frame (H200×200×6×8) is subjected to vertical load of 80kN (elevator + cargo) and horizontal wind load, the checked safety factor is 1.45 > 1.3.

 Whole Structure Stability:

• The structure's natural vibration period is 0.85s, which avoids resonance with the dominant wind frequency of New Caledonia; the anti-overturning coefficient at the foundation is 2.8 > 1.5 (meet the anti-overturning requirement under extreme wind load).

 Core Conclusion: The structural design with CBC custom H300×300×8×14 columns and H350×200×8×10 main beams fully meets the load and use requirements of New Caledonia, and all key indicators are higher than the minimum safety standards.

 

 Market Adaptability: Combined with CBC's Core Export Markets: Oceania, Southeast Asia, South America, this design is optimized for the marine tropical climate and medium-heavy load warehouse demand of New Caledonia (Oceania), and has different degrees of adaptability to CBC's main markets, with the core adaptation logic matching CBC's product series (custom H-steel, hot-dip galvanizing, modular steel structure):

 High Adaptability Areas (Oceania: Papua New Guinea, Fiji, Solomon Islands):

• Climate similarity: Same marine tropical climate as New Caledonia, high wind load (2.0-3.0kN/㎡), high air humidity; CBC's hot-dip galvanizing process (anti-corrosion) and wind load-optimized frame design are fully applicable.

• Demand matching: Medium-heavy load (8-10kN/㎡) warehouse is the mainstream demand in these areas, and CBC's modular fabrication (fast installation) is in line with the local construction level.

• Product matching: Direct use of CBC's custom H300×300×8×14/H350×200×8×10 product series without major structural modification.

 Medium Adaptability Areas (Southeast Asia: Philippines, Indonesia, Malaysia):

• Climate characteristics: Tropical monsoon climate, high wind load (2.5-3.5kN/㎡, typhoon-prone), high seismic intensity (6-7 degrees); the original design needs partial modification (seismic/wind load reinforcement) to adapt.

• Demand matching: The 10kN/㎡ live load meets the local warehouse cargo storage demand, and CBC's prefabricated steel structure is suitable for the local fast construction demand.

• Product matching: CBC's hot-dip galvanizing product series is applicable (anti-humidity/anti-corrosion), and the column/beam section can be adjusted based on the existing custom H-steel mold (no re-mold cost).

 Medium-Low Adaptability Areas (South America: Chile, Peru, Brazil):

• Climate/geological characteristics: Chile is prone to strong earthquakes (8-9 degrees) and coastal wind load (3.0-4.0kN/㎡); the Amazon basin has high humidity and heavy rain, and the southern part has low temperature.

• Demand matching: The 10kN/㎡ live load is in line with the local industrial warehouse demand, but the original design's seismic/wind load capacity is insufficient.

• Product matching: CBC's hot-dip galvanizing product series is applicable to coastal areas of Chile, but the structural system needs to be optimized (e.g., adding anti-seismic supports) to match the local geological conditions.

 Inadaptable Areas (Low-load/Inland Arid Areas):

• Such as the inland areas of Africa with low wind load (<1.5kN/㎡) and low live load (<5kN/㎡); the original design's section is too large, leading to cost waste, and CBC's small-specification C/Z-section steel product series is more suitable.

 Core Summary: This design is the core product solution of CBC for the Oceania marine market, and can be quickly adapted to Southeast Asia/South America through modular modification (CBC's core advantage), which is in line with the product positioning of CBC's export steel structure (customization, anti-corrosion, fast installation).

 

 Targeted Modifications: Based on Philippine Local Codes: NSCP 2015, Typhoon/Seismic Prone, Marine Corrosion. The Philippines is a typical typhoon-prone (wind load up to 3.5kN/㎡) and moderate seismic (7 degrees) marine tropical country, and the original design needs the following modifications (all based on CBC's existing product series, no re-mold for custom H-steel):

 Wind Load Reinforcement (Adapt to 3.5kN/㎡ Typhoon Wind Load):

• Column/Beam Section: Keep CBC H300×300×8×14 columns (increase stiffener density from 1.2m to 0.8m, CBC factory pre-welded); upgrade main beams from H350×200×8×10 to CBC custom H350×200×10×12 (increase web/flange thickness, bearing capacity increased by 22%).

• Roof System: Upgrade roof purlins from C250×75×20×3.0 to C300×80×20×3.5 (CBC standard); add CBC standard wind bracings (angle steel L63×6) at the roof ridge and gable to resist wind suction.

• Enclosure System: Upgrade color steel single sheet from 0.65mm to 0.8mm (CBC standard export anti-wind type); add CBC steel frame reinforcements at the south end rolling shutter doors (4×3m) to avoid door panel damage by typhoon.

 Seismic Reinforcement (Adapt to 7-Degree Seismic Intensity, NSCP 2015):

• Joint Design: Modify beam-column rigid connection from "high-strength bolt only" to CBC's bolt-welded hybrid connection (factory pre-welded stiffener + on-site high-strength bolt connection), which improves seismic performance by 30%.

• Lateral Bracing: Add CBC standard X-type lateral bracings (angle steel L70×7) at the ramp/elevator/stairwell and building gable (all floors) to enhance the lateral stiffness of the structure.

• Foundation Connection: Upgrade column base bolts from M24 to M30 (10.9s grade, CBC standard), and increase the base plate size from 400×400×20 to 500×500×25 (CBC factory prefabricated) to improve the seismic anti-slip/anti-overturning capacity.

 Anti-Corrosion Reinforcement (Philippine Coastal Marine Corrosion):

• Keep CBC's full hot-dip galvanizing process, and upgrade the galvanized coating from AZ150 to AZ200 (CBC high-grade anti-corrosion product) for all steel members (especially coastal projects).

• Add CBC standard anti-corrosion paint (epoxy zinc-rich paint, 80μm) on the surface of the hoistway/stairwell steel frame (frequently used parts) for double anti-corrosion.

 Local Use Adaptation:

• The ramp slope is adjusted from 15° to 12° (in line with Philippine local small cart operation standards); the freight elevator is upgraded to CBC's 5-ton anti-seismic type (matching local elevator inspection requirements).

• Increase the number of roof circular ventilators from 14 to 18 sets (CBC Φ600mm) to adapt to the higher temperature and humidity in the Philippines.

 Material Consumption Change: The total steel consumption increases by about 18% (from 252.9 tons to 298.4 tons), all modified parts are CBC's existing standard/custom products, and the factory prefabrication rate remains above 90% (CBC's core advantage).

 

 Targeted Modifications: Based on Chile Local Codes: NCh 433, Strong Earthquake, High Coastal Wind Load, Mountain Climate. Chile is located in the Pacific Ring of Fire, with strong seismic intensity (8-9 degrees) in most areas, coastal wind load up to 4.0kN/㎡, and large temperature difference in mountainous areas; the modifications are focused on seismic fortification and ultra-high wind load resistance, all combined with CBC's South American export product series:

 Ultra-High Seismic Reinforcement (8-9 Degrees, NCh 433 Standard):

• Structural System Upgrade: Modify the original portal rigid frame to CBC's dual anti-seismic frame system (main frame + eccentrically braced frame), add CBC custom eccentric bracings (H200×150×6×8) at the first/second floor column spans (N-S direction) to dissipate seismic energy.

• Column/Beam Upgrade: Upgrade steel columns from H300×300×8×14 to CBC custom H350×300×10×16 (bearing capacity increased by 45%); main beams upgrade to H400×200×10×14 (CBC custom), and add web stiffeners (CBC factory pre-welded) at the beam end to prevent shear failure.

• Connection & Bracing: All beam-column/column-foundation connections adopt CBC's seismic grade 1 bolt-welded connection; add vertical steel plate shear walls (CBC standard 10mm thick) at the stairwell/hoistway to enhance the lateral anti-seismic capacity.

 4.0kN/㎡ Wind Load Reinforcement:

• Roof & Enclosure: Replace roof purlins with CBC's Z300×80×20×4.0 (higher torsional resistance); use CBC's 0.9mm thick color steel single sheet (double rib type) for the enclosure, and fix it with self-drilling screws with rubber gaskets (CBC standard) to prevent wind dislodging.

• Building Corners: Add CBC's wind-resistant corner columns (H350×300×10×16) at the four corners of the building, and add diagonal bracings to resist local wind pressure concentration.

 Climate & Local Adaptation:

• Anti-Corrosion: Coastal Chile projects adopt CBC's hot-dip galvanizing (AZ200) + polyurethane paint double anti-corrosion; inland mountainous areas increase the thermal insulation layer (CBC standard 50mm rock wool) for the color steel sheet to adapt to the large temperature difference.

• Load Adjustment: The live load is kept at 10kN/㎡ (in line with Chile's industrial warehouse standard); the roof snow load is considered (0.5kN/㎡ for southern Chile), and the roof purlin spacing is adjusted to 1.0m to bear snow load.

• Construction Adaptation: Adopt CBC's ultra-modular fabrication (prefabricated frame units of 6m×8m) to adapt to Chile's high construction cost and low on-site construction level.

 Material Consumption Change: The total steel consumption increases by about 45% (from 252.9 tons to 366.7 tons), the factory prefabrication rate is about 85%, and all modified parts are CBC's custom products for the South American market (mold reuse).

 

 Targeted Modifications: Based on Papua New Guinea Local Codes, High Wind Load, Tropical Rainforest Climate, Low Construction Level. Papua New Guinea is a typical Oceania tropical rainforest country with wind load of 2.8-3.0kN/㎡, high air humidity (annual average humidity >85%), frequent heavy rain, and low local construction level; the modification principle is minor structural adjustment, high prefabrication rate, and strong adaptability, which is the most adaptable market for the original design among the three countries:

 Minor Wind Load Reinforcement (Adapt to 3.0kN/㎡):

• Keep the original CBC H300×300×8×14 columns and H350×200×8×10 main beams; add CBC standard angle steel L50×5 wind bracings at the roof gable and the 3rd floor enclosure to resist the 3.0kN/㎡ wind load (no section upgrade required).

• Upgrade the roof ventilator to CBC's wind-resistant type Φ600mm (with rain cover) to avoid rainwater backflow caused by strong wind and heavy rain.

 Anti-Corrosion & Humidity Resistance (Tropical Rainforest Climate):

• Keep CBC's full hot-dip galvanizing process, upgrade the galvanized coating from AZ150 to AZ180 (CBC medium-grade anti-corrosion product) for all steel members to adapt to high humidity.

• Add CBC standard drainage grooves (steel plate 3mm thick) at the roof edge, ramp top and elevator hoistway to accelerate rainwater discharge and avoid water accumulation and corrosion.

• The steel decking at the ramp is added with CBC's anti-rust anti-slip strip (rubber + steel) to prevent slip caused by rainwater.

 High Prefabrication Rate (Adapt to Low Local Construction Level):

• Maximize CBC's factory prefabrication (prefabrication rate ≥95%): pre-assemble beam-column frames, hoistway/stairwell steel frames, rolling shutter door frames in the factory, and mark the installation position with QR codes (CBC's intelligent construction technology for Oceania).

• Simplify on-site connections: all secondary connections adopt CBC's quick-install self-locking bolts (no on-site welding required) to adapt to the low skill level of local construction workers.

 Local Use & Climate Adaptation:

• Increase the number of floor drainage holes (CBC standard) to adapt to frequent heavy rain; the 2nd/3rd floor windows are replaced with CBC's anti-mosquito screen windows (local demand) on the basis of standard aluminum alloy windows.

• The roof daylighting panel is upgraded to CBC's anti-UV FRP type (2.0mm thick) to adapt to the strong ultraviolet radiation in Papua New Guinea; the number of daylighting panels is increased by 4 pieces to improve the indoor lighting (reduce the use of electric lights, in line with local power shortage).

• The brick wall of the 1st floor is adjusted to 240mm thick (local common brick size), and CBC provides prefabricated brick wall connecting pieces (no on-site secondary processing required).

 Material Consumption Change: The total steel consumption increases by about 5% (from 252.9 tons to 265.5 tons), the minimum modification among the three countries, and the on-site construction period is shortened by 30% (CBC's modular advantage is fully exerted).

 

All modified designs for the Philippines, Chile and Papua New Guinea are based on CBC's existing product series (custom H-steel, standard C/Z-section steel, hot-dip galvanizing), realizing mold reuse and high factory prefabrication rate, which is fully in line with CBC's export steel structure product positioning of customization, anti-corrosion, modularization and fast installation; the modification degree is positively correlated with the local natural disaster risk (Chile > Philippines > Papua New Guinea), and the structural safety is fully in line with the local building codes of each country.