Ambiguous or incomplete Bill of Quantities (BOQ) descriptions for toilet cubicles frequently lead to tender disputes, contractor variation claims, and consultant submittal rejections. This guide outlines standard BOQ wording, unit measurement conventions, and ironmongery schedule integration in accordance with Qatar Construction Specifications (QCS).
1. Unit of Measurement: Number (Nr) vs. Square Metres (m²)
In modern Qatar tenders, measuring cubicles per complete cubicle compartment (Nr) or per complete washroom suite is preferred over superficial area (m²). Measuring by unit count encapsulates all doors, pilasters, intermediate division panels, ironmongery, and overhead structural bracing into a single clear line item.
2. Sample Comprehensive BOQ Specification Clause
ITEM DESCRIPTION SAMPLE (STANDARD COMMERCIAL TOILET CUBICLE):
"Supply and install commercial toilet cubicle partitions fabricated from 13mm thick Solid Compact Laminate (Phenolic Core) complying with EN 438-4, solid water-resistant phenolic core, with CNC-beveled and polished black edges.
System to include Grade 304 satin stainless steel gravity self-closing hinges, indicator deadbolt latch with external emergency coin-slot release, coat hook with rubber buffer, and floor-anchored adjustable stainless steel pedestal foot (100mm–150mm height adjustment).
Top bracing by heavy-duty continuous extruded anodized aluminum box section headrail. All fixings, stainless steel U-channel wall fixings, perimeter silicone sealant, shop drawings, and on-site testing included complete as per Consultant approval and QCS standards."
3. Key Technical Clauses That Must Be Explicitly Stated
- Board Core Density & Standard: Must specify "Solid Compact Laminate with density ≥ 1,400 kg/m³ complying with EN 438-4" to prevent contractors substituting cheap laminated chipboards.
- Ironmongery Material Grade: State "Grade 304 Stainless Steel" for standard interiors, or "Grade 316 Stainless Steel" for coastal or industrial facilities.
- Outward-Swinging Accessible Units: Universal Accessible cubicles should be measured as a distinct BOQ item with 900mm clear door openings and extended lever latches.
- Shop Drawings & Site Verification: Include explicit requirements that the specialist subcontractor must carry out laser site verification prior to factory CNC cutting.
4. Free BOQ & Take-off Review Service
Are you preparing a tender or responding to an unpriced BOQ? Send your draft schedule of finishes and washroom layout drawings to Doha Cubicles. Our estimators will provide verified item descriptions, quantity take-offs, and competitive trade pricing.