Cast-in channels for curtain wall installation are fully embedded in concrete. These channels carry the loads from the curtain wall and transfer them to the main structure. Thus, these cast-in channels shall be tested to demonstrate a minimum performance as required by the engineer.
The testing shall be carried out by an independent, approved laboratory.
– Hydraulic pump complete with calibrated pressure gauges
– Hollow ram hydraulic jack of sufficient capacity
– Reaction test jig
– Test load: 1.2 … 1.5 x service load (unfactored)
– Alternative test load: characteristic resistance for steel failure as per technical approval (sufficient edge spacing provided)
– Minimum concrete grade as specified
– Required tightening torque to be observed
Check that the equipment to be used is duly calibrated with valid certificate.
Insert T-bolts onto the cast-in channel and set-up the pull-out test jig onto the cast-in channel.
Ensure that the reaction frame with hydraulic jack is standing in upright position and aligned to the cast-in channel.
Connect the high pressure tube from the hydraulic pump to the jack.
Once the set-up is done, start the test and ensure that the pressure/force is set to zero.
Apply pressure in equal increment as possible until it is set to the required test force/pressure.
The force/pressure shall be observed and there shall be no reduction within 1 minute to “PASS” the test otherwise it is considered “FAIL”. The concrete surface surrounding the cast-in channel shall be visually inspected for signs of “DAMAGES” or “CRACKS”.
The results of the tests shall be recorded and evaluated. The record must contain the following:
– designation of the product or the components
– nature of check or test
– date of testing of the product
– results of test, comparison with requirement
– failure mode, if any:
1 Break of anchor bolt shaft
2 Break-off anchor bolt head
3 Pull through of anchor head
4 Break-off anchor bolt foot
5 Break-out of anchor bolt foot off the channel´s back
6 Break-out of T-bolt off the channel slot
7 Bending up of channel lips