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close this bookAppropriate Building Materials: a Catalogue of Potential Solutions (SKAT; 1988; 430 pages)
View the documentPreface
Open this folder and view contentsIntroduction
Open this folder and view contentsFundamental information on building materials
Open this folder and view contentsFundamental information on building elements
Open this folder and view contentsFundamental information on protective measures
Open this folder and view contentsExamples of foundation materials
Open this folder and view contentsExamples of floor materials
Open this folder and view contentsExamples of wall materials
Open this folder and view contentsExamples of roof materials
close this folderExamples of building systems
View the documentMud brick vaults and domes
View the documentEarthquake resistant mud/bamboo structures
View the documentAdobe brick house
View the documentModular framed earth block construction
View the documentLok Bild system
View the documentConcrete panel house
View the documentFerrocement housing units
View the documentFibracreto building system
View the documentBamboocrete construction
View the documentBamboo houses
View the documentPrefabricated timber hut
View the documentPrefabricated wooden house
View the documentTimber houses for flood areas
View the documentRha-lime prototype house
Open this folder and view contentsAnnexes

Lok Bild system


Special properties

Interlocking blocks, high strenght, easy assembly

Economical aspects

Medium to high costs


Very good

Skills required

Average construction skills

Equipment required

Special framework, standard building equipment

Resistance to earthquake

Very good

Resistance to hurricane

Very good

Resistance to rain

Very good

Resistance to insects

Very good

Climatic suitability

All climates

Stage of experience

Increasing applications; widely tested system


• The LOK BILD System was developed by Dr. A. Bruce Etherington of AIT Bangkok and University of Hawaii, and has been tested in Malaysia, Thailand and the Philippines using cement concrete, and in the United Arab Emirates using sulphur concrete.

• The hollow blocks are designed to be assembled without mortar, producing perfectly aligned walls without special masonry skills. The system also includes precast concrete joists, which interlock with the concrete block walls to support in situ floors and roofs, and channel blocks, which are placed on top of the walls to make reinforced concrete ring beams.

• The interlocking blocks have narrow vertical recesses and a central cavity, which when assembled form continuous, vertically aligned holes over the full height of the wall. When cement grout is poured into them, the blocks become permanently locked together. Wherever necessary, eg at corners, cross-walls, or around openings, the large hollow cores can be filled with reinforcement and concrete, providing earthquake resistance.

Further information: Dr. A. Bruce Etherington, Human Settlements Division, Asian Institute of Technology, P.O. Box 2754, Bangkok 10501, Thailand; Bibl. 24.05.

Ordinary block; Half block; Channel block; LOK BLOK Assembly (Bibl. 24.05)

Floor Assembly

House Isometric

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