8

ERTEK BUILDING SYSTEM
RESEARCH AND TECHNOLOGY ON CONSTRUCTION

PRESENTATION AND PROPAGATION OF BUILDING TECHNOLOGY

home

profile

What is the ERTEK system

The construction method in a glance
The ERTEK building system in a glance

A brief description of the ERTEK technology

Description of the attributes of the structural skeleton

Technical features
Elements of the structural skeleton
Reduced weight and anti-earthquake behavior

Architectural possibilities

Economy of construction

Production of the structural skeleton
The utility of the structural skeleton as infrastructure for the completion of the construction
Consequences of the reduced time of production on the economy of the construction

Construction quality

Duration of the construction process – Parallel program

Example case study of the ERTEK system

Production cost
Duration of the production process

History

Implementation experience

Downloads

Time and cost schedule of a building project
3D model of the structural skeleton
Visualization of the structural elements

Example case study of the ERTEK system

We are going to describe the cost and time schedule of an imaginary case study of the ERTEK system application on a small three-floor building whose typical floor includes eight 3.60/3.60m slab units. The schedule includes the materials, the labor for the production of the structural skeleton, the stair construction and the pipework installation. The cost scheduling is based on the following price table:

Structural Steel	600€ per tn
Concrete	60€ per m3
Daily hire of an unskilled worker	75€ (social security included)
Daily hire of a skilled worker	105€ (social security included)
Daily hire (€) of a 10tn crane	200€
Daily hire (€) of a 40tn crane	300€

The results reported below were aquired by a spreadsheet (free to download) that allows general project scheduling, depending on both the project's specifications and the resources available.

Production cost

FLOORS	3	Plot covered area (m2)	Built-up area (m2)
SLAB UNITS IN ONE FLOOR	8	103,68	311,04
	Quantity	Unit Value (€)	Total Value (€)
COLUMNS	72	29,36	2113,70
SLAB UNITS	24	401,67	9640,05
FOUNDATION UNITS	8	370,25	2962,02
STAIR UNITS	4	171,36	685,44

LABOR			7995,00

Total Project Price (€)			23396,22
Price per m2 (€)			75,22

The comparative cost of resources for the aforementioned case study is given by the following table:

	RESOURCES	Volume (m3)	Weight (kg)	Price (€)	Price %
MATERIALS	Structural Steel	0,661	5187,154	3112,29	13,30
	Bolts - Nuts - Washers	0,006	48,245	57,89	0,25
	Structural Steel of joints	0,341	2674,778	3209,73	13,72
	Wire mesh	0,519	4073,627	2444,18	10,45
	Concrete	85,139	204332,781	5108,32	21,83
	Expanded Polysterine	24,480	0,00	1468,80	6,28
	Material Totals	111,145	216316,585	15401,22	65,83
LABOR	Blinding concrete with wire mesh			300,00	1,28
	Column production			1500,00	6,41
	Pre-slab production			2130,00	9,10
	Foundation			285,00	1,22
	Assembling			1890,00	8,08
	Pipework			870,00	3,72
	Stairs			420,00	1,80
	Concrete casting			600,00	2,56
	Labor Totals			7995,00	34,17

Duration of the production process

Labor Prerequisites (days) Duration (days)

Blinding concrete with wire mesh 2

Column production 2 3

Pre-slab production 5 3

Foundation 8 1

Assembling 9 3

Pipework 10 2

Stair Units 10 2

Concrete casting 12 4

Total project duration (days) 16

pinax

The duration of each work is reported in the yellow fields, while the overall duration of the works that constitute preconditions is reported in the purple fields.