Lotm, Welcome.
Does anybody know the strength of the tyrell's bannister's... Because I have notcied that they didn't do much dying
Very interesting topic. We've not seen any POV's from Highgarden so it's a bit hard to gauge the strength of the Tyrell's bannisters compared to the bannisters in King's Landing, Winterfell, the Twins, Harrenhal, Riverrun, the Eyrie, and Dorne.
Balustrade or bannister (sometimes spelled banister) walking and sliding is a common occurance among adventerous children. Yes, and if you're not careful you can die from a mishap.
As with our world I'd guess that bannister sliding is a favorite past time among children in Westeros. I seem to recall Arya balancing and walking the bannister's of the Red Keep... she's very small and skinny so those bannister's are at least strong enough for a small child.
As with Arya, Bran climbed on everything in Winterfell. My guess is that the bannister's in the Stark's home is strong enough to support energetic kids.
From the Bran and Catelyn chapters it seems that the children of the Twins don't play on bannisters... they prefer playing Lord of the Crossing.
I suspect the bannisters of Harrenhal are either burnt or rotted out. Remember when Chiswyck fell? Harrenhal's bannisters did not help him one bit.
Regarding the bannisters in question, I think that Mace is too fat to slide down the bannisters of Highgarden... it would take incredibly strong bannisters to support him. Maybe the bannisters of Highgarden are strong enough...
The important thing to remember when sliding down a bannister or balustrade is to stop or jump off before you hit the post. Hitting a post while going feet first (either on your stomach or your back) will hurt tremendously. I'm thinking
what if Loras and Margaery both had accidents in their childhoods, then this could explain Margaery's current conflict with the Sparrows and Loras' undying loyalty to Renly.