Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements Section 09: Building Works  11 of 24 9.1.16.3 Folding Shutter Doors  9.1.16.4 Internal Doors and Frames  9.1.16.5 External Doors and Frames  9.1.16.6 External Windows  Folding shutter doors shall be bi-parting, and shutter constructed of galvanised mild steel having two  coats of paint and zinc chromate primary coated. The leading two pairs of shutter leaves shall bunch  independently of each set to provide a personnel passage. Leaves shall generally be about 305 mm  wide, shall bunch against columns at jambs and shall be reinforced with a lattice frame of approved  design. The top rolling track shall be supported by brackets, which are bolted to the underside of the  supporting reinforced concrete beam. A channel guide set into the floor slab shall finish flush with the  internal floor finish and shall be of heavy duty rolled steel sections set apart with bolted or welded dis- tance plates or of other suitable design capable of trafficking by heavy trucks. Dirt boxes with access  covers shall be provided at each hanging (bunching) jamb. Channels shall carry surface water drainage  into dirt boxes, which are to be provided with outlets discharging into sleeves to the exterior of the  building. Where required a 14 gauge end panel shall be fitted to close off each jamb and fit to one  slamming stile a hook lock and a mortise box to the other with lock of the five levers or pin tumbler  pattern to the Engineer’s approval. The key shall be operable from the outside and the inside of the  building. Rubber draught/dust excluding seals shall be provided at the top and bottom edges.  Each slamming stile shall be fitted with a pair of heavy duty ”D” pull handles securely bolted through  the door and located above or below the lock without obstructing it.  The Contractor shall provide for approval details of folding doors and full information location and  fixing details, allowing for all boxing out and drillings which will be required. The Contractor shall  ensure that reinforcement details, building details and the like on all affected structural and general  arrangement drawings are compatible with the door and these shall be submitted to the Engineer for  approval at the same time as the door details above are provided.  Internal doors and frames shall be hardwood timber. All internal doors shall be painted to a colour as  agreed with the Engineer.  Internal doors shall be designed such that they swing to the closed position unless deliberately held  open.  External doors and frames shall be thermal blistered and finished externally in anodised aluminium  with a bronze tone that matches the windows.  External doors shall be designed such that they swing to the closed position unless deliberately held  open. The doors and frames shall be fitted with efficient draught excluders.  Glazing to external doors shall be toughened glass. Samples of toughened glass shall be submitted to  the Engineer for his approval. The colour of all external glass shall be to the approval of the Engineer.  Large gates may be designed as folder doors.  All windows shall be from one manufacturer only and be manufactured from extruded aluminium.  Windows shall be of the thermal blistered double insulated type and shall be glazed in a coloured glass  to the approval of the Engineer. Windows of toilets and showers shall be frosted.  9_Vol3_d4.3_Section 9 building works_en_GIR_rev6.docx 