Steel Consumption Estimation For Peruvian Trapezoidal Steel Structure Warehouse

Steel Consumption Estimation for Peruvian Trapezoidal Steel Structure Warehouse

 

Plan Shape: Trapezoid

Length: 190m

Width: 80m (narrow end) / 116m (wide end)

Building Area: 18,620 ㎡

Eaves Height: 17.4m (tall workshop)

Structure Type: Truss Structure, continuous span about 22m per span, bay spacing about 24m

Implementation Standard: Peruvian Local Building Codes + Local Wind Load, Snow Load

 

Based on Peruvian local building codes, project load requirements and structural characteristics (large span, tall eaves), the recommended structural section sizes are as follows, using Peruvian standard steel grade Gr.50 (equivalent to ASTM A36) for all components, which has good strength, ductility and is suitable for industrial building projects in Peru.

 

Top Chord & Bottom Chord of Truss: H-section steel, adapted to the 22m span and 24m bay spacing.

Section Size: H400×200×8×10 ~ H450×200×10×12

Remarks: The section size is appropriately increased for the trusses in the wide end (116m side) to bear the greater horizontal and vertical loads.

Truss Web Members: Angle steel and I-section steel, used to connect the top and bottom chords and transfer loads.

Angle Steel: L100×8 ~ L125×10 (for general web members)

I-section Steel: I140×80×5×7 ~ I160×88×6×9 (for key force-bearing web members)

 

Section Type: H-section steel, matching the truss load and 17.4m eaves height.

Section Size: H450×250×10×12 ~ H500×250×12×14

Remarks: The column section at the wide end is slightly larger to ensure structural stability under uneven load distribution.

 

Bracing (Top Chord & Bottom Chord): Round steel or angle steel, used to resist horizontal forces (wind, earthquake) and maintain truss stability.

Round Steel: φ20 ~ φ25

Angle Steel: L80×6 ~ L100×8

Tie Rods: Steel pipe or round steel, used to transfer horizontal tension between trusses.

Steel Pipe: φ114×4 ~ φ140×5

Round Steel: φ22 ~ φ28

 

Purlins (Roof): C-section steel or Z-section steel, adapted to roof load and span.

Section Size: C200×70×20×3.0 ~ C250×75×20×3.5

Wall Beams: C-section steel, matching the wall load and height.

Section Size: C180×70×20×2.5 ~ C220×70×20×3.0

 

High-strength Bolts: Grade 10.9, matching the section size of trusses, columns and bracing, with hot-dip galvanizing anti-corrosion treatment.

Self-tapping Screws and Rivets: 304 stainless steel, used for connecting purlins, wall beams and roof/wall panels.

 

The detailed material statistics are based on the total building area of 18,620 ㎡, the recommended section sizes and the experience value of 38 kg/㎡. The specific breakdown of each component is as follows (for quotation and material preparation reference):

Component Type	Steel Consumption Index (kg/㎡)	Total Steel Consumption (tons)	Proportion	Remarks
Main Trusses (Top Chord, Bottom Chord, Web Members)	18 ~ 22	372.4	52.6%	Based on the average index of 20 kg/㎡, the main force-bearing components
Steel Columns	8 ~ 10	167.6	23.7%	Based on the average index of 9 kg/㎡, matching 17.4m eaves height
Bracing and Tie Rods	3 ~ 4	65.2	9.2%	Based on the average index of 3.5 kg/㎡, ensuring structural stability
Purlins and Wall Beams	5 ~ 6	102.4	14.5%	Based on the average index of 5.5 kg/㎡, including roof and wall skeleton
Fasteners and Accessories	0.5 ~ 1	9.3	1.3%	Including high-strength bolts, self-tapping screws, etc.
Total	38	716.9	100%	Slight deviation from the total estimation (±1.3%) due to rounding

 

 

Structure Type: Portal Frame/Truss Workshop with large span and tall eaves, requiring higher steel consumption than ordinary workshops.

Regional Conditions: The wind and snow loads in coastal and plateau areas of Peru are generally not large, and there is no extreme cold, so no additional steel consumption for cold resistance is required.

Experience Value (Trusses + Steel Columns + Bracing + Purlins + Roof and Wall Skeleton):

Ordinary Low Workshop: 25 ~ 30 kg/㎡

Large-span Truss with Eaves Height Above 15m: 35 ~ 45 kg/㎡

This project adopts the middle-upper value of 38 kg/㎡ for estimation, considering the trapezoidal layout and uneven load distribution.

 

 

Total Steel Consumption = Building Area × Steel Consumption Index ÷ 1000

18620 ㎡ × 38 kg/㎡ ÷ 1000 ≈ 707.6 tons

Recommended Quotation/Material Preparation Range: 650 ~ 840 tons

Economical Design: About 650 tons (optimized section size, suitable for general load conditions)

Safe/Heavy Load/High Standard Design: About 840 tons (conservative design, suitable for high load or strict code requirements)

 

 

Local Wind Load, Snow Load and Seismic Coefficient: Different regions in Peru (coastal vs. plateau) have different load parameters, which will directly affect the section size of components.

Whether there are cranes, suspended loads and roof live loads: The addition of cranes or other heavy loads will significantly increase steel consumption.

Whether the roof/wall adopts heavy-duty panels and the thickness of thermal insulation cotton: Heavy-duty panels will increase the roof load, and thicker thermal insulation cotton will affect the overall load distribution.

Truss Type: Tube Truss / H-section Steel Truss / Angle Steel Truss: Different truss types have different steel consumption, and tube truss generally has higher steel consumption than angle steel truss.

Fire and Corrosion Resistance Levels and Peruvian Local Steel Grades (such as Gr.50): Higher fire and corrosion resistance levels will increase the cost and steel consumption, and different steel grades will affect the section size selection.

If you can provide the following information:

Specific location (which city in Peru/coastal or plateau)

Whether there are cranes and roof loads

I can provide a more accurate range and breakdown (main structure/purlins/bracing) in accordance with Peruvian codes.