Cathedral West-Side Closure Proposal The balance will come from community Cover Page and fence can be closer dismantling of west foyer possible rockfall hazard eliminated locally improved appearance degradation significantly reduced much reduced pigeon access greatly reduced weather ingress to get a Better Situation contact the Cathedral. This is a free-standing structure and does not fundraising, and hopefully Anglican donations. $12,000 provided by Geoffrey Rathbun. to the Anglican Church of Canterbury It will cost about $60,000, with Add this Structure some rockfall hazard it's unattractive for tourists and citizens fast degradation of Cathedral & contents pigeons have free access rain & dust enters freely Cathedral West-Side Currently (2 March, 2015) nd 021 052-8050 / 3585-922 / bsed.gr@gmail.com 256 Waimairi Road, Ilam, Christchurch Geoffrey Rathbun , Mechanical Engineer 1
Installation - 1 - preparatory work A steel lifting loop is also partially supports a large piece of fallen masonry Lightweight support brackets are used to temporarily support each end of a whaler as it is disconnected. welded to the centre of each whaler The lowest whaler is Each concrete block weights about 7 tonnes with attachment bracket the Cathedral from West Side, aerial the steel “Frame” installed to support the West wall not removed as it in correct positions TWO Remove these Remove this rubble ONE Remove these 2 containers THREE window covers. concrete blocks Smaller covers will be attached later FOUR Remove the top three “whalers” FIVE Place these 4 2
Installation - 2 - install side walls First the wall with attached stays Finally, the western stay is fastened to it’s concrete block it is fixed there with pins. The wall is now self supporting north wall of the foyer. Once touching the ground, The wall is then moved down and towards the block. This block is specially shaped to fit close to the tower. The inner (eastern) stay is manually attached to the taller concrete is lowered close to the concrete blocks TWO install the north wall ONE install the south wall it is fixed there with pins. The wall is now self supporting south wall of the foyer. Once touching the ground, The wall is then moved down and towards the pulled sideways and attached to the concrete blocks The lower ends of the stays are manually stays hang freely is lowered close to the concrete blocks First the wall with attached stays 3
Installation - 3 - install porch roof lift up roof again. A man will be attach to them walls. Lower onto walls and centrally located above the two Move roof north till it is FOUR needed on the roof. on the inside of the frame arm and The roof is moved as far to the north as is THREE re-attach crane hook to lifting bar Removing lifting hook. part of lower frame “arm”. It is stable here. TWO lower the roof to lie on top of south wall and north ONE insert the roof between the upper and lower frame “arms” from the south the south part of the frame possible, with the crane cable almost touching 4
Installation - 4 - install west wall FOUR take the weight. bracket and wood will be used to Fixation will use an adjustable the west wall to the porch roof. Attach the two lower corners of lugs attached to the west wall these attachment arms to the frame arms. Then, weld all of to the lower parts of the upper Weld two more attachment arms to Frame and Porch Roof Complete attachment of west wall b ONE weld two support arms to the a side view looking North along the gap between cathedral roof and frame west and lowered onto the two attachment arms once central to the Cathedral, the wall is moved a little a little above the attachment arms on the frame. Then, Move the west wall carefully north. The support lugs pass THREE so as to clear the Cathedral during installation The returns are in the “open” position the 1.2m gap between the Cathedral west wall and the frame arms. TWO lift up the west wall, and locate it in-line with and south of top of the upper arms of the frame 5
Installation - 5 - final steps ONE close and lock the roof returns so that they lie about 50mm away from roof surface TWO close and lock the side returns so that they lie about 50mm away from the Cathedral side walls THREE fit the spouting and two downpipes to the porch roof. The porch roof takes all the rain runoff 6
Details - North and South Walls Number of Angled Purlin Cuts yes, 3 degrees at one end of all sheets, opposite hand for North wall Roofing Steel Mass kg 313 Purlin Sec�on Name Dimond DHS-400-1.95 Total Length of Purlins m 80.8 Number of Purlins 1 24 1 5.79 x 10.26 10 Total Mass of Purlins kg 869 Wooden Bearers mm x mm 50 x 100 Number x Length mm 16 x 400 Total Mass of Wood kg 12 North and South Walls Angled End Trim ? m x m 7 North and South walls are identical, but opposite hand. Purlins and roofing steel are attached together with standard fittings from Dimond Flashing is used, but is detailed on separate sheet is trimmed with opposite hand The only differing component is the roofing steel which 5786 Roofing Overall Dimensions 10260 The 4 lifting and attachment lugs shown are called up on another sheet 456 Total Mass kg 1194 Roofing Steel Sec�on Name Dimond SteelSpan 900 - 0.55 Roofing Steel Area m^2 58.5 50 100 ° 3 Roofing steel removed for clarity in this view
Details - Porch Roof Number of Angled Purlin Cuts m x m 14.08 x 7.45 Number of Purlins 1 30 Angled End Trim ? no 1 146 0 Roofing Steel Mass kg 561 Total Mass of Purlins kg 1569 Porch Roof Roofing Overall Dimensions m 8 Total Mass The 2 lifting lugs shown are called up on another sheet Purlins and roofing steel are attached together with standard fittings from Dimond Flashing is detailed on separate sheet 14079 7445 456 kg Total Length of Purlins 2130 Roofing Steel Sec�on Name Dimond SteelSpan 900 - 0.55 Purlin Sec�on Name Dimond DHS-400-1.95 Roofing Steel Area m^2 105.6 Roofing steel removed for clarity in this view
Details - West Wall sheets trimmed to opposite hand to m 111.9 Roofing Overall Dimensions m x m 11.78 x 10.75 Number of Purlins 1 27 Angled End Trim ? yes, at 37 degrees at one end and north south sheets 80.8 Number of Angled Purlin Cuts 1 14 Roofing Steel Mass kg 431 Total Mass of Purlins kg 897 West Wall (excluding Returns and Flashings) Total Length of Purlins m^2 9 called up on another sheet but are detailed on another sheet 11775 10754 2986 standard fittings from Dimond Roofing Steel Area Purlins and roofing steel are attached together with The 4 attachment and 2 lifting lugs shown are Flashing is detailed on separate sheet 355 Total Mass kg 1328 Roofing Steel Sec�on Name Dimond SteelSpan 900 - 0.55 Purlin Sec�on Name Dimond DHS-300-1.75 Returns (Roof and Side) are attached to this wall Roofing steel removed for clarity in this view ° 7 3
Details - side stays 3 are described on separate sheet Stay Attachment Weldments See separate sheet for details Each Stay has a welded fitting attached to each end. Standard Stay They run down the full length of each short side of the twin-purlin Two sheet metal joiner strips (not shown) hold the twin-purlin together. Side Stays - Made from Two Purlins Riveted Together 1 7 150 Dimond DHS-400-1.95 North East for Tower 9.17 9172 197 Dimond DHS-400-1.95 Standard Quan�ty Length (m) Purlins Only Weight (kg) Purlin Profile Configura�on SCALE 1 : 4 SECTION A-A 7000 A A 10
Details - flashings 0 29.4 9.74 4 (includes 2 flat folds) two angled end cuts one cutout 2 Returns Roof 0.55 6.5 9,47 3 angled, one right angle 2 West Wall Top Returns Side 0.55 1.65 2.43 3 angled, one right angle 0 2 Flashings including Returns West Wall - Side Porch Roof - North West Wall - Top Returns - Side and Roof 0.55 2 Porch Roof - Side 0 Flashing Name and Area Thickness (mm) Weight (kg) Length (m) Folds Special Cuts Quan�ty Porch Roof Side 0.55 32.15 7.5 4 2 0 Porch Roof North 0.55 42.1 14.2 2 0 1 West Wall Side 0.55 9.1 3 4 (includes 2 flat folds) 11
Details - Profiles and Weldments stainless steel galvanised 8 West Wall A�achment Lug 1.9 600 x 300 x 12 painted 4 Return A�achment Bracket 0.43 125 x 76 x 50 64 1.2 Weldments and Profiles Stay Attachment Bracket Lifting Lug General Whaler Temporary Support Attachment West Wall Support Arm Lifting Lug for Side Wall West Wall Attachment Lug Return Attachment Bracket 700 x 110 x 16 Li�ing Lug General Name / Area 28 Mass (kg) Overall Size (mm) Finish Quan�ty Stay A�achment Bracket 8 400 x 200 x 160 galvanised 8 Whaler Temporary Support A�achment 1080 x 600 x 200 4 plain 2 West Wall Support Arm 40 1300 x 280 x 320 painted 4 Li�ing Lug for Side Wall 2.9 390 x 50 x 45 galvanised 12
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