Photograph from the model of the main workshop building now in course of construction.
workshop and office staff at midday the column head, adequate sections maximum rise or drop of tempera- and to provide recreational facilities are provided for maximum bending ture of 80 degrees combined with for staff out of working hours. It is moments without penalizing the en- effects of shrinkage of concrete due also planned to incorporate four tire framing.
to curing. quarters for workshop staff who are required to be available to handle breakdowns of plant and vehicles outside normal working hours.
The main beams of the intermedi-
The concrete was a 1; 2; 4 mix- ate frames are 18 inches wide by ture and was consolidated by me- vibrator. The allowable 3'-6" deep at the crown, 4'-6" over chanical the column head. The shallowest stresses were 1000 lbs. sq. in. com- The most interesting feature of the section is at quarter points of the pression in the concrete and 18.000 design of the new workshops, from centre span which is 2'-6". The soffit Ibs. sq. in. tension in the steel. an engineering point of view, is the of the beam is made up of parabolic
The new workshops were designed reinforced concrete framework. As curves which give a smooth appea- in the Architectural Office of the has been stated previously, the main rance. The cantilever roof and part Public Works Department in close building, exclusive of the gantry of the centre span roof slabs follow consultation with the engineers of block, is 363 feet long by 131 feet the soffit of the beam and provide the Electrical and Mechanical Office, wide. Expansion joints are placed the compression flanges for the ne- and under the supervision of the 121 feet from each end, making three identical sections each consisting of
gative moments.
7 two-hinged reinforced concrete The tapered columns are support- frames at 20 feet centres. Between ed on piled foundations, and are the frames, and forming the roof. hinged at their junctions with the are reinforced concrete slabs. The pile caps.
The horizontal thrust is columns are set back 27 feet from resisted by 5 degree battered piles the edge of the building, leaving a clear span of 78 feet.
and tie-beams connecting opposite pile caps. Each hinge consists of one pair of cast steel bases and a 2 inch round steel pin. The exposed surfaces of the bases and the pin are coated with a mixture of coal-tar. lime and cement for rust protection. In addition to regular roof loadings. framing was designed for a
In order to attain a closer agree- ment between the thrust line and the outline of the frame, a gable shape bent was chosen the gable shape has the inherent advan- tages of the arch form. By haunch- ing the members at the apex and at the
Details of the reinforced concrete framework of the new main workshop building.
Chief Architect.
General Contractor: Construction Co.
Cheong Lee
Piling: H.K. Engineering & Con-
struction Co., Ltd.
Felt Roofing: Dreyer & Co., Ltd. Electrical Installation: The British
General Electric Co., Ltd. “NACO" Louvre Windows: John D.
Hutchison & Co., Ltd. Scalocrete Floor Finishing: William
Jacks & Co.. Ltd.
Gantry Crane & Overhead Runway.
Gilman & Co., Ltd.
العالم
SECTION
A-A
INKEUCHAR
TOP OF PILE CAN
35
Fi
MAL
12:0
*220*
17:00
[MOD]