Prepare a design for a pump station shed

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Reference no: EM13939096

1.0 GENERAL

The structural design shall be carried out in accordance with the relevant and applicable Australian Standards.

2.0 SCOPE

This document defines the preliminary requirements for the structural steel design for a pump station shed in Telfer, Western Australia.

The shed structure is required to provide shelter for a small water treatment pump station. In order to carry out maintenance on the pumps, a suspended monorail with a 4-tonne lifting capacity is required along the centreline of the structure.

Prepare a design for a pump station shed having a clearance opening width of 6.2 m, an overall length of 18 m and clearance height to the underside of the monorail beam of 4.2 m. The roof is to be clad with Custom Orb sheeting. The sides and ends of the shed are not clad.

Design the following elements:
• The steel structural system, including major column and beam elements, bracing members, purlins and girts
• Major connections for the steel frame
• Base plate and anchor bolts
• Roof cladding

Justify all design decisions and elements.

Full design of the monorail beam is not required, however, it will be necessary to estimate the depth of the beam to ensure sufficient underside clearance is achieved.

The structure will be assumed to be assembled on a simple pad footing. Design of the footing is not part of the scope.

Capital cost economy is a key design consideration. The resulting design and arrangement ideally will be the most economical when considering materials, fabrication, transportation and site erection. Modularisation may reduce time and cost, and improve construction safety and should be considered.

Appropriate site construction cranes can be assumed to be available for the construction of the structure.

REFERENCES

Navisworks image of pump station equipment and surrounding features.

Sample structural drawings (demonstrating the level of detail required).

The portal frame design and design process are to be presented in an oral presentation. Accompanying calculations and structural drawings are to be submitted separately. Refer to Assessment and Feedback Specification for full details.

DESIGN LOADS

General

Design shall be performed as per the AS 1170 Parts 0, 1 and 2, except as specified below.

Load conditions shall be assessed based on Structure Importance Level 2.

Permanent Actions

Minimum weights of materials shall be as per AS/NZS 1170.1:2002 Tables A1 and A2.

Imposed Actions

Imposed actions shall be in accordance with AS/NZS 1170.1:2002.

Wind Actions

Wind actions shall be calculated in accordance with AS/NZS 1170.2:2011.

Load Combinations

Load combinations shall be assessed in accordance with AS/NZS 1170.0:2002.

The minimum robustness requirements of AS/NZS 1170.0 shall be complied with.

Soil Properties

Assume the structure to be constructed on sound, firm material. The footing design is not part of the scope.

PLATE WORK AND STRUCTURAL STEELWORK

6.1 General

Design shall be in accordance with AS 4100.

6.2 Materials

Hot rolled steel sections shall be grade 300 to AS 3679.1.

Plates shall be grade 300 to AS 3678.

6.3 Transportation

The transport envelope requirements for items fabricated off-site shall be considered.

Maximum shipping width on West Australian roads is 3.5 m, without permits.

Greater than 5.5 m, escorts and police clearance is required and time added to organise.

A maximum height of 2.5 m from the top of the transport trailer.

Shipping containers can also be considered.

7.0 SERVICEABILITY

The design working life of the pump station shed shall be 50 years.

The maximum serviceability deflection (vertical) of the structure supporting the monorail beam shall be span/500.

8.0 SOFTWARE

The structural frame analysis may be performed using SpaceGass or Multiframe.

Reference no: EM13939096

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