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Mischmasch13 Oct 2021 20:04Hello dear forum members,
Can someone help with the following question? I have several isolated pad footings made of concrete under my terrace slabs at the corners of the terrace. Now, I want to add strip footings (for conservatory sliding doors) between the pad footings afterwards. Can anyone give me a tip on how to connect the existing pad footings with the new strip footings? The goal is load distribution!
Thanks in advance and best regards,
Michael
Can someone help with the following question? I have several isolated pad footings made of concrete under my terrace slabs at the corners of the terrace. Now, I want to add strip footings (for conservatory sliding doors) between the pad footings afterwards. Can anyone give me a tip on how to connect the existing pad footings with the new strip footings? The goal is load distribution!
Thanks in advance and best regards,
Michael
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Simon-18914 Oct 2021 10:01Hello,
Connecting to an existing foundation is usually done as follows:
Drill holes about 350–400mm (14–16 inches) deep every 100mm (4 inches) along the side of the foundation (diameter 16 / 18mm), then bond steel connection bars, for example with a chemical anchor like Hilti HIT-HY 200, into these holes. The bars should protrude 500mm (20 inches) from the foundation and the last 100mm (4 inches) are bent 90°. This way, you can later hook and securely tie the longitudinal reinforcement of the new strip foundation there.
As @Rumbi441 already asked, it obviously depends on the loads applied to the foundation. The strip foundation can quickly become 500mm (20 inches) wide and 800mm (32 inches) deep.
Connecting to an existing foundation is usually done as follows:
Drill holes about 350–400mm (14–16 inches) deep every 100mm (4 inches) along the side of the foundation (diameter 16 / 18mm), then bond steel connection bars, for example with a chemical anchor like Hilti HIT-HY 200, into these holes. The bars should protrude 500mm (20 inches) from the foundation and the last 100mm (4 inches) are bent 90°. This way, you can later hook and securely tie the longitudinal reinforcement of the new strip foundation there.
As @Rumbi441 already asked, it obviously depends on the loads applied to the foundation. The strip foundation can quickly become 500mm (20 inches) wide and 800mm (32 inches) deep.
In der Ruine14 Oct 2021 11:25Simon-189 schrieb:
As @Rumbi441 already asked, it obviously depends on the loads applied to the foundation.
The strip footing can easily end up being 500mm (20 inches) wide and 800mm (31 inches) deep. My extension won’t even need such a massive foundation. It’s not going to have steel vault doors.
The weight of the patio roof is already supported by the pad foundations. Now it’s really just about the glazing.
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Mischmasch14 Oct 2021 11:28Thank you very much for the explanation. It has become clearer now.
I have not yet received exact information regarding the load, but according to my calculation, it should be a maximum of 250kg (550 lbs). Four tempered safety glass (ESG) sliding panels, each 8mm (5/16 inch) thick, will be installed along a length of 4m (13 ft). The height of the panels is approximately 2.2m (7 ft 3 in). If all panels are opened on one side, a maximum load of 250kg (550 lbs) per meter will be applied.
I have not yet received exact information regarding the load, but according to my calculation, it should be a maximum of 250kg (550 lbs). Four tempered safety glass (ESG) sliding panels, each 8mm (5/16 inch) thick, will be installed along a length of 4m (13 ft). The height of the panels is approximately 2.2m (7 ft 3 in). If all panels are opened on one side, a maximum load of 250kg (550 lbs) per meter will be applied.
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