问题描述：
英语翻译
PROVIDE CONCRETE COVER BLOCKS OR STANDARD BAR CHAIRS WITH PROTECTIVE TIPS AND SPACERS SPACED AS REQUIRED TO PROVIDE SPECIFIED CONCRETE PROTECTION FOR REINFORCEMENT BUT NOT TO EXCEED 900mm ON CENTER FOR ALL SLABS,AND BEAMS,PLACE BAR CHAIRS OR COVER BLOCKS LONGITUDINALLY IN ALL BEAMS DIRECTLY BELOW THE STIRRUPS.BARS SHALL BE TIED IN PLACE WITH #16 DOUBLED-ANNEALED IRON WIRE.
PROVIDE CONCRETE COVER BLOCKS OR STANDARD BAR CHAIRS WITH PROTECTIVE TIPS AND SPACERS SPACED AS REQUIRED TO PROVIDE SPECIFIED CONCRETE PROTECTION FOR REINFORCEMENT BUT NOT TO EXCEED 900mm ON CENTER FOR ALL SLABS,AND BEAMS,PLACE BAR CHAIRS OR COVER BLOCKS LONGITUDINALLY IN ALL BEAMS DIRECTLY BELOW THE STIRRUPS.BARS SHALL BE TIED IN PLACE WITH #16 DOUBLED-ANNEALED IRON WIRE.
问题解答：
我来补答
提供能形成保护空间和间隙的钢筋混凝土保护层垫块(图1类型)或钢筋垫块（图2类型）,按要求放入所有的梁和板中,中到中的距离不超过900mm,钢筋混凝土保护层垫块或钢筋垫块在梁内纵向布置直接放在箍筋下.所有钢筋用16号火烧丝双股绑牢. 再问： 保护层垫块和钢筋垫块怎么和平时的不一样呢 ALTERNATIVE BAR 和 ALTERNATIVE BAR REVERSED 是什么一起呢？
再答： 保护层垫块和钢筋垫块怎么和平时的不一样？活到老，学到老吧，呵呵。 ALTERNATIVE BAR 是替代钢筋的意思，如果有其他问题，请向我直接提问，这个问题先给个满意答案吧，呵呵。
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