No_9_September_1968 — Page 20

sections along the longitudinal direc- tion to meet the required floor to ceiling clearance of 8ft. in the bedrooms.

D. Deck roof: Again, with limited floor to floor height at some areas, and with some columns discontinued at the floor below, plus significantly larger floor loadings on this floor, it was necessary to use structural steel beams and girders.

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E. Shear wall (SW-10) vertical truss assembly and anchorages: With the bulk of the lateral forces to be resisted by this assembly (approximately 80 per cent.) on both transverse and longitudinal directions during earthquake, it was necessary to use structural steel in the form of vertical trusses. This also permitted some of the mechanical engineering ducts to pass through the wall between web members without affecting the struc- tural integrity of the complete shear wall assembly.

Large shear wall-column core forces that act alternately in both compres sion and tension during an earthquake posed the problem of efficiently anchoring these column cores at the foundation. This was solved by using structural steel, shear-head type connections in the form of built-up intersecting cross-like anchorages em- bedded in the foundation pile caps.

Columns were generally made up of wide-flange rolled shapes reinforc- ed with two plates because it was not

feasible to order an equivalent larger- sized rolled-shape.

For the upper basement and ground floor beams and girders were generally of rolled shapes without reinforcing plates. In some instances however, where some floor panels were without slab as in the upper basement floor over the mechanical equipments on the lower basement floor, it was necessary to reinforce some of the beams that were used as struts, to resist likely axial loads during an earthquake.

Almost all the steel girders at typical floors at the tower portion were of built-up shape-generally of two lin. thick relatively wide flanges with two 3% in. thick webs. Their depths were limited to 10in. out-to- out of flanges. These girders were enclosed in 14in. deep by 6ft. wide concrete slab bands.

At the deck floor there were two instances where plate-girders were used. One was a 60 ft. span and the other 40 ft. Other members were generally rolled shape and built-up girders similar to those on the lower floors.

The core carries three passenger lifts of 3,500 lb. capacity, 500 f.p.m. and two service lifts. It also carries all the services, which include sprinkler system with fire detector in each room.

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For the ground floor walls and for all interior partitions hollow concrete

blocks were used. External horizontal wall panels are precast concrete_units with a chipped white concrete finish; these were lifted into place by two 30 metre boom jib cranes.

Sheet piling on the site began in March 1965. Construction and finish- ing were completed in December 1967.

The cost of construction was P27 million. Hotel equipment and furnish- ings cost P14.5 million a total of P41.5 million. The average cost per room was P150,000.

Contractors

D.M. Consunji, Inc. construction managers.

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were

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Principal sub-contractors included: Western Steel, Inc. steel substructure Atlantic Gulf & Pacific Corp. steel

superstructure

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C.F. Pablo & Sons precast units A.M. Cuasay Plumbing Const. Co, Inc.

plumbing

Otis Elevator Co.

lifts

Filipinas Marble Corp., Eastern Marble

Products, and Marblecraft, Inc.

marble

Permaline inc.

Dale Trading

Norton & Harrison

aluminium

mosaic tiles

Dubricon tiles

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Lepanto Crafts, Inc. drapery and

carpets

Woolcraft Inc. carpets

Wood Patterns, and A.E. Cruz, Inc.

narra wall, ceilings and carved doors Pacific Woodworks-furniture

Norton & Harrison (Schlages), Shriro Phil. (Russwin) and Wm. Reynolds (Yale) hardware Electrical Rehabilitation

electrical

Service

MEM

electrical products are known and appreciated everywhere

Sole Agents :-

INNISS RIDDLE (CHINA) LIMITED. 608-616, Prince's Building, 6th Floor, P. O. Box 73, Hong Kong.

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MEM electrical accessories comprise full ranges of surface and flush mounting switches and ring circuit accessories (socket outlets and fused spur boxes, switched or unswitched). Finishes include moulded and metalclad, including stainless steel.

MIDLAND ELECTRIC MANUFACTURING CO. LTD. Reddings Lane Tyseley Birmingham England

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MEM

Far East BUILDER, September 1968.

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