JT102
Civil/Environmental
- Apr 23, 2013
- 2
Hi everyone
Can someone suggest how I would model a glass floor panel to determine the min support around the edges. This is my first engineering job, and I am unsure how to proceed but would like to show some initiative if anyone is willing to help me.
This is a domestic application, and from BS 6399: Part 1: 1984 it shows you need a minimum of Uniformily distributed load 1.5 kN/m2 and Concentrated Load 1.4kN
The size is 600mm by 700mm = 0.42m2 . The thickness is likely to be 30.5mm. Although this is somewhat flexible.
The material is toughened laminated glass. 19mm + 1.5mm spacer + 10mm. I am taking this to be 2.5kg/m2/mm thickness (excl. spacer) = 2.5 x 0.42 x 29 = 32.025kg
Max deflection = L2 / 50000 x t
L = length of glass side
t = glass thickness excl. spacer
Deflection = 6002/ 50000 x 29 = 0.24mm
Deflection = 7002 / 50000 x 29 = 0.34mm
I've found some properties here:
Young's Modulus = 70GPa
It is supported on all four edges, and will sit in the floor spanning two joists and with two noggins on the other two sides. The top will be flush with the floor boards, but has an expansion gap filled with silicone around the edge.
I was wondering if I might model it as either a statically indeterminate load, or simply supported with two points?
many thanks
Can someone suggest how I would model a glass floor panel to determine the min support around the edges. This is my first engineering job, and I am unsure how to proceed but would like to show some initiative if anyone is willing to help me.
This is a domestic application, and from BS 6399: Part 1: 1984 it shows you need a minimum of Uniformily distributed load 1.5 kN/m2 and Concentrated Load 1.4kN
The size is 600mm by 700mm = 0.42m2 . The thickness is likely to be 30.5mm. Although this is somewhat flexible.
The material is toughened laminated glass. 19mm + 1.5mm spacer + 10mm. I am taking this to be 2.5kg/m2/mm thickness (excl. spacer) = 2.5 x 0.42 x 29 = 32.025kg
Max deflection = L2 / 50000 x t
L = length of glass side
t = glass thickness excl. spacer
Deflection = 6002/ 50000 x 29 = 0.24mm
Deflection = 7002 / 50000 x 29 = 0.34mm
I've found some properties here:
Young's Modulus = 70GPa
It is supported on all four edges, and will sit in the floor spanning two joists and with two noggins on the other two sides. The top will be flush with the floor boards, but has an expansion gap filled with silicone around the edge.
I was wondering if I might model it as either a statically indeterminate load, or simply supported with two points?
many thanks
