Timber Nailed Post And Rail Fence

By Huu Khanh Nguyen · Updated October 28, 2026 · timber, fence, post and rail, nailed, BS 1722, agricultural, highway, boundary

A straight run of sawn timber posts with sawn rails nailed to their face, the agricultural and highway boundary fence. Two, three or four rails Post size Timber species or colour

Parameters

Name	Default	Unit
Run Length	5550	mm
Fence Height	railType == 'two' ? 900 : railType == 'fourTall' ? 1400 : 1200	mm
Post Spacing	1800	mm
Distribution	count
Rails	four
Post Width	150	mm
Post Depth	75	mm
Finish	white
minPitch	postWidth + 87	mm
span	sizeX - postWidth	mm
bayCount	Math.max(1, Math.ceil(span / bayWidth - 1e-9))
lastBay	span - (bayCount - 1) * bayWidth	mm
merged	distribution == 'distance' && bayCount > 1 && lastBay < minPitch