Structural Health Monitoring
Investigation on structural healthiness after fire incidents
Non-Destructive Testing
Equipped with non-destructive testing tools and backed by a team with years of extensive experience, Joist is able to provide comprehensive structural diagnosis by applying non-destructive testing techniques. Some of these techniques include Shmidt Hammer testing for strength; Ultrasonic pulse velocity testing to obtain information about the properties of concrete components, uniformity of concrete, cavities, cracks, defects due to fire, modulus of elasticity and quality and consistency of concrete throughout the structure; Electromagnetic cover meter survey; Electromagnetic tests using a ferrous can equipment that determines the size of bars, spacing, cover to reinforcement and also gives the image of the scanned reinforcement ; Penetration resistance (Windsor Probe) test; Half cell potential measurement; Concrete resistivity test; Impulse response test; Steel hardness test; Impact echo test; Infrared thermography inspection; In-situ surface absorption test; In-situ carbornation test; In-situ tensile pull-out and shear tests on structural fixtures and architectural finishes; Crack monitoring; Mechanical and strain gauging; Temperature and strain monitoring of mass concrete casting;Full scale load deflection testing; Surface penetration radar survey; Fibrescope inspection; Sprayed fire-proofing material compatibility test; Water tightness test on windows, curtain walls, precast panels; Profile testing for carbonation and chloride to determine the residual life for old structural elements; Determining type of cracks by use of a crack width gauge microscope among others
Material Testing and Investigation
Core cutting to extract cores for testing concrete strengths; Compressive strength testing on sampled concrete cubes and cores; Concrete Chemical Analysis; Geotechnical soil investigations/trial pits; Geotechnical investigation up to the determined depth set up of rigs and laboratory analysis; Compaction tests using a nuclear gauge densometer/insitu density; Proof load tests; Plate load bearing test to determine ground bearing capacity; Timber survey/ Timber investigation by use of a moisture mitre; Ultrasonic thickness gauge/ Corrosion tests.
Structural Integrity Assessment and Analysis
Our experienced team of engineers execute both visual and structural assessments of structures for the purpose of determining whether a more detailed analysis is necessary. If found necessary, the team executes a structural analysis of the as-built system to determine whether, after comparison of as-built and ‘’as-designed/as-redesigned’’ systems, the structural parameters such as moment capacities, deflection, and stability are adequate in serviceability and ultimate limits. From these analyses, a retrofitting design follows if the structural elements are found inadequate.
Structural Audits
Retrofitting Design.
Retrofitting design usually follows a structural integrity design analyses that indicate some inadequacies in the structural members. The main objective of retrofitting design is to determine and detail remedial works necessary to strengthen the exisiting structure. Ordinarily, the end product of this design includes retrofitting design drawings, bills of quantities and program of works for retrofitting.
