GBP-12 GBP-13 GBP-14

*column head specifications:
180x150 300x120 300x150

*main column specifications:width300-600 x thickness50-150

*column foot specifications:
180x150 width100/125/150xthickness50-150 340*150

GBP-15 GBP-16 GBP-17

*column head specifications:
300x120 300x150 300x150

*main column specifications:width300-600 x thickness50-150
