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precast ground beams
i was looking at an engineers design (uk) for precast ground beams supported on small poured insitu pilecaps. when the beams are placed the joints are poured.
some of the beams had 3no. 32mm bars in the bottom (3 no. 12mm bars top)(straight) and they had approx. 150mm bearing on the edge of the pilecap. to anchor / tie the beams at the support was a single 12mm u bar.
designing insitu foundations i would carry min. 50% of bottom steel to a min length of 12 dia. passed the centre line of the support (centre of cap).
is this precast system ok without either u or l bars at the end of the precast beams and only 1 no. 12mm u bar across the centre of the cap?

could anyone provide input on this??
the development length is not sufficient by aci, but different codes give different minimums.

2009-09-15, 02:19 PM	#1
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	precast ground beams precast ground beams i was looking at an engineers design (uk) for precast ground beams supported on small poured insitu pilecaps. when the beams are placed the joints are poured. some of the beams had 3no. 32mm bars in the bottom (3 no. 12mm bars top)(straight) and they had approx. 150mm bearing on the edge of the pilecap. to anchor / tie the beams at the support was a single 12mm u bar. designing insitu foundations i would carry min. 50% of bottom steel to a min length of 12 dia. passed the centre line of the support (centre of cap). is this precast system ok without either u or l bars at the end of the precast beams and only 1 no. 12mm u bar across the centre of the cap? could anyone provide input on this?? the development length is not sufficient by aci, but different codes give different minimums. __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]