izont ally ▁in ▁a ▁ce iling ▁or ▁floor , ▁often ▁accessed ▁via ▁a ▁lad der . ▁ ▁A ▁water ▁door ▁or ▁water ▁entrance , ▁such ▁as ▁those ▁used ▁in ▁Ven ice , ▁Italy , ▁is ▁a ▁door ▁leading ▁from ▁a ▁building ▁built ▁on ▁the ▁water , ▁such ▁as ▁a ▁canal , ▁to ▁the ▁water ▁itself ▁where , ▁for ▁example , ▁one ▁may ▁enter ▁or ▁exit ▁a ▁private ▁boat ▁or ▁water ▁tax i . ▁ ▁Const ruction ▁and ▁components ▁ ▁P anel ▁doors ▁ ▁P anel ▁doors , ▁also ▁called ▁st ile ▁and ▁rail ▁doors , ▁are ▁built ▁with ▁frame ▁and ▁panel ▁construction . ▁EN ▁ 1 2 5 1 9 ▁is ▁describing ▁the ▁terms ▁which ▁are ▁officially ▁used ▁in ▁European ▁Member ▁States . ▁The ▁main ▁parts ▁are ▁listed ▁below : ▁ ▁St iles ▁– ▁Vert ical ▁bo ards ▁that ▁run ▁the ▁full ▁height ▁of ▁a ▁door ▁and ▁compose ▁its ▁right ▁and ▁left ▁edges . ▁The ▁h ing es ▁are ▁mounted ▁to ▁the ▁fixed ▁side ▁( known ▁as ▁the ▁" h anging ▁st ile "), ▁and ▁the ▁handle , ▁lock , ▁b olt ▁or ▁l atch ▁are ▁mounted ▁on ▁the ▁swing ing ▁side ▁( known ▁as ▁the ▁" l atch ▁st ile "). ▁ ▁Rails ▁– ▁Hor izontal ▁bo ards ▁at ▁the ▁top , ▁bottom , ▁and ▁option ally ▁in ▁the ▁middle ▁of ▁a ▁door ▁that ▁join ▁the ▁two ▁st iles ▁and ▁split ▁the ▁door ▁into ▁two ▁or ▁more ▁rows ▁of ▁pan els . ▁The ▁" top ▁rail " ▁and ▁" bottom ▁rail "