I wanted to get peoples opinion on designing for both hail and solar panels(PV) now that the NCC requires all warehouses to be designed for PV panels.
Following a number of warehouse collapses after a hail storm in Sydney, the ACSE released guidance for hail loading on roofs. The guidance...
Thanks. I agree that it seems large. However I have found the specification below from DOT New York which references 3 inches. I cant find it in any standards however.
The maximum elastic deflection of the transparent acrylic noise barrier panel, under the design
wind load shall be less than 3...
I have been provided a design for acrylic panels for a sound barrier by the manufacturer. They have designed to a deflection limit of span/20 or 75mm which they have claimed is standard practise in the USA but can't produce any reference documents. In Australia AS5100.2 cl25.3.8 stipulates...
EireCHch
Yes I would normally use 2/3 phi which would be appropriate for a crushed rock base. I am concerned that if the crushed rock is substituted with concrete then the sliding resistance will actually be reduced. But I see concrete being substituted for crushed rock on a regular basis.
Does anyone have any information on the coefficient of friction of a segmental retaining wall with gravel or no fines backfill on the concrete base?
It seems to be general practise to interchange either a concrete or crushed rock base, but I am concerned that the concrete base will provide a...
Yes the corner posts are braced.
The affected zone is 2 times wall height however.
This wall is 14m high so it would extend 28m either side.
Thanks again
Is it a bad thing to have splices extending across multiple lifts?
You will end up with a line of bars terminating at the same point as a construction joint otherwise.
Perhaps you could stagger the laps vertically and extend across lifts.
I have seen a wall blow out that was poured too soon...
Hi Tomfh
Thanks for the response.
I am using AS1170.2 (2011) Table D2 (C). See link below. AS1170.2 (2021) says the same, but it is not gazetted yet.
https://res.cloudinary.com/engineering-com/image/upload/v1655864163/tips/AS1170.2_extract_wp0ium.pdf
I know that ASCE 7-16 suggests that local...
Hi all
I am designing a noise wall that that has multiple 45 degree (or 135 deg) changes in direction along its length.
Australian standard AS1170.2 Appendix D, stipulates that the pressure coefficient for a 90 degree corner formed in a wall is 1.8 vs 1.2 typically.
The commentary gives no...
