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plan
Layout & grid
Building outline, grids, bay spacing, openings and accessories.
Design workflow · Proposal drawings (PPD)
Proposal drawings – see the building before you sign
With every quotation we issue proposal drawings (PPD): layout, elevations, cross-sections and an isometric of the structure, the preliminary design criteria and the steel quantities behind the price – so you compare offers on substance, not on a single number.
- Step 1
- Of our design workflow issued with the quotation
- Layout
- Plans, elevations, sections plus an isometric view
- Quantities
- Behind the price preliminary weights by package
- Options
- Compared side by side spans, cranes, mezzanines
What proposal drawings are
Proposal drawings – PPD – are the drawings that accompany our quotation. They turn your brief into a structure you can see: building layout and grid, frame type and spans, eave and ridge heights, crane and mezzanine provisions, openings and accessories, with the preliminary design criteria – codes, loads and materials – we priced.
They also show the preliminary steel quantities by package, so the price has a visible basis. PPD are for evaluation and contract negotiation only – they are not for construction. Once the contract is signed, they become the starting point for the approval drawings.
Contents
What a PPD package contains
Typical contents – scaled to the size and stage of the enquiry.
plan
geometry
Elevations & sections
Frame type, spans, eave and ridge heights, roof slope and clearances.
3D
Isometric view
A 3D impression of the structure for quick review by all stakeholders.
codes · loads
Preliminary design criteria
Design codes, wind, seismic and live loads, crane and collateral loads assumed in the price.
price basis
Preliminary quantities
Estimated weights of frames, secondary steel, bracing and cladding areas.
choices
Options & clarifications
Alternative solutions, exclusions and points to confirm before contract.
应用领域
Why every quotation comes with drawings
01
Compare offers on substance
Spans, heights, loads and quantities on paper – not just a lump-sum price.
02
Scope agreed early
Openings, cranes, mezzanines and accessories are visible and can be corrected before the contract.
03
Options side by side
Alternative spans, frame types or crane provisions priced and drawn for an informed choice.
04
Transparent price basis
Preliminary weights by package show what the price includes.
05
Faster approval later
An agreed PPD shortens the approval stage after contract signature.
06
Ready for your bank or board
A clear package for internal approval and project financing.
Design workflow · step 1 of 6
Where this fits in our design workflow
PPD are step 1 of the six-step World Steel design workflow. After the contract is signed, the agreed PPD become the approval drawings, the design report and the column reactions – approved by you before anything is fabricated.
World Steel 设计流程
- 01方案图随报价提供的 PPD – 平面布置、剖面、工程量
- 02报批图纸、设计报告及柱底反力停检点
- 033D Tekla 模型每个构件、钢板、螺栓和焊缝
- 04加工详图构件图和零件图、CNC 数据
- 05安装图平面图、剖面图、安装顺序、螺栓清单
- 06竣工图最终记录，连同质量文件
第 2 步后设停检点：报批图纸获批前不进行任何加工。
What we need
From your brief to a proposal
A useful PPD needs only a few inputs: site location, building use and size, clear height, cranes and mezzanines, openings, cladding and the design code you build under. Architectural sketches or a layout help, but are not required – we can propose the layout for you.
流程
The World Steel design workflow
- 1
1 · Proposal drawings (PPD)
Layout, sections and preliminary quantities issued with the quotation.
- 2
2 · Approval
Approval drawings, design report and column reactions – approved before fabrication.
- 3
3 · 3D Tekla model
Every member, plate, bolt and weld modelled and clash-checked.
- 4
4 · Shop drawings
Assembly and part drawings, CNC data and material lists.
- 5
5 · Erection drawings
Plans, sections, sequence and bolt lists for site.
- 6
6 · As-built drawings
Final record of the structure as built.
FAQ
常见问题
Are proposal drawings free of charge?
PPD are part of our quotation service for qualified enquiries. They are for evaluation only and remain World Steel's property until a contract is signed.
Can we build from proposal drawings?
No. PPD are preliminary and marked "not for construction". Construction follows only the approved drawings, shop drawings and erection drawings issued after the contract.
Can we ask for alternative options?
Yes – different spans, frame types, crane capacities or mezzanines can be drawn and priced side by side.
What happens to the PPD after the contract?
They become the basis of the approval drawings, the design report and the column reactions – step 2 of our workflow.
Send us your brief
Location, size, use and any sketches – we reply with a quotation and proposal drawings you can compare.