The Use of Pre-Engineered Building System in Mining Industries; the Implementation of Value Engineering Concept in Optimizing Project Cost (Case Study: Fire Station and Emergency Clinic Project) 1 st MICCE Makassar, Indonesia March 2010 Presented by Ir. Habibie Razak, IP Ir. Hajar Aswad
VE is a systematic evaluation of a project design to obtain the most value for every dollar of cost. By carefully investigating costs, availability of materials, construction methods, shipping costs or physical limitations, planning and organizing, cost/benefit values, and similar cost influencing items, an improvement in the overall cost of a project can be realized.
4 Fundamentals of VE
Function = specific purpose or use intended for something
Worth = least cost required to provide the function
Cost = total amount of money required to obtain and use the function
Value = worth = utility
Opportunity for Value Engineering: VE by the Architect or Engineer, VE by Contractor Opportunity for VE by the Contractor Opportunity for VE by the Architect or Engineer Level of Activity Time Project/Phase Start Project/Phase Finish Feasibility Study Phase Design Phase Procurement Phase Construction Phase Start-up Phase Operation & Maintenance Phase Initiating Processes Planning Processes Controlling Processes Closing Processes Executing Processes
Design concrete structures with as many duplicate members as is practical to allow the reuse of forms without rebuilding
Confine design elements to modular material sizes where possible
Simplify the design of the structure wherever possible
Design for the use of cost-saving equipment and methods
Eliminate unnecessary special construction requirements
Design to reduce the required labor to minimum
Specify a quality of workmanship that is consistent with the quality of the project
Methods of Value Engineering used by Engineers (Continued)
Furnish adequate foundation information wherever possible
Refrain from requiring the contractor to assume responsibility for information that should have been furnished by the engineer, or for the adequacy of the design
Use local materials when they are satisfactory
Write simple, straightforward specifications that state clearly what is expected of the contractor. Use standardized specifications that are familiar to most contractors whenever possible
Hold preconstruction conferences with contractors to eliminate any uncertainties and to reduce change orders resulting from misunderstandings to a minimum
Pre-Engineered Building System, an Alternative Design to Implement Value Engineering Concept
In structural engineering, pre engineered buildings (PEBs) is constructed using a pre-determined inventory of raw materials that can satisfy a wide range of structural and aesthetic design requirement.
The primary framing structure: build up of I shaped members, often referred as I beams.
The I beams used are usually formed by welding together steel plates to form the I section. The I beams are then bolted together to form the entire frame of the Pre-Engineered Building.
Some manufactures taper the framing members (varying in web depth) according to the loadings with larger depths in the areas of highest stress.
Pre-Engineered Building System, an Alternative Design to Implement Value Engineering Concept (Continued)
Basic Building Parameter of Pre-Engineered Building
Use of PEB in Fire Station and Emergency Clinic Building Project; the Implementation of VE Concept
Project objective is to build a new facility for Fire Station for reliable operation to back up the existing operation especially to response emergency cases. The new building will accommodate office staffs, training room, parking of fire truck equipment, gymnasium and include clinic facilities
Project Owner: General Manager EHS PT Inco
Scope of works: comprised geotechnical/civil and structural, mechanical, electrical and instrumentation
Project team were taken from Central Engineering PT Inco consist of project manager, project engineer, design engineer (civil, mechanical, electrical and instrument)
Key Aspects to Decide using PEB System on Design Phase
Less budget allowed by business case that was presented by project sponsor
More time required to develop design calculation, detail drawing and so on by in-house engineering. By PEB concept, project engineer only sent the building parameter to vendor (drawing layout and specifications)
Bidding list had also shown the price differences between conventional steel and pre-engineered building. It was proven from in-house engineering designs using conventional steel, the price of PEB is 30% cheaper
Comparison between PEB and Conventional Steel Price
Cross Section of Structures resulted from In-house Engineering Design Calculations
Product of Pre-Engineered Building on this Project
Design information such as applicable design codes, material specifications, design assumptions and load combinations, design summary, plan and elevations, frame cross section, roof extension details, portal frame details, column reaction, drainage design, and bracing design
Computer design print outs
Design reference tables and computer explanations
Product of Pre-Engineered Building on this Project
The construction product as a process and result of delivery and construction stages as follows:
PEB s teel materials
Shipment to site
Supervision during erection
Punch list and commissioning
Owner’s m aintenance manual for PEB system provided by v endor
Lessons Learned and Conclusion taken from Project
P rofessional engineer must be open minded to new ideas, new innovations and technologies. There are always opportunities to try something new on the project that is possible to give more benefits to the successful of the project. PEB system is actually an old technology in low rise buildings, unfortunately, currently some of in house civil engineers are only focusing on conventional steel experiences.
Value engineering concept is very applicable on design phases where the engineers could save more money without reducing the utility or function of final products.
The use of pre-engineered building could benefit both engineers (project engineer) and constructors. Engineer was only doing FEED stage to produce the layout and specification and then the EPCI work will be performed by the constructor + PEB vendor easily.