Curved Roof Gazebo

A free-standing hexagonal or octagonal gazebo with a flared roof on posts, with round-headed braces under the headers. Six or eight sides and plan size, Overall height, eave height and roof flare, Post, header and rafter sizes, Size of the round braces, Finish

Details

Category: Gazebos › Gazebos and Garden Pavilions

By Huu Khanh Nguyen · Updated November 5, 2026

Parameters

Name	Default	Unit
Width across corners	4180	mm
Depth	sizeX * (sides % 4 == 0 ? 1 : Math.cos(Math.PI / sides))	mm
Height	3320	mm
Eave height	2210	mm
Sides	6
Roof overhang	400	mm
Roof curve sag	120	mm
Roof board thickness	28	mm
Post size	120	mm
Header width	203.2	mm
Header depth	254	mm
Rafter width	101.6	mm
Rafter depth	203.2	mm
Brace run	430	mm
Brace rise	340	mm
Timber	timberSpruceGlulam
Roof covering	timberSpruceSawn
drop	roofThickness * Math.sqrt(1 + ((sizeZ - eaveHeight) / (sizeX / 2 * Math.cos(Math.PI / sides))) * ((sizeZ - eaveHeight) / (sizeX / 2 * Math.cos(Math.PI / sides))))	mm
headerTop	(eaveHeight + (sizeZ - eaveHeight) * (1 - (((sizeX / 2 * Math.cos((Math.PI / sides)) - overhang + beamWidth / 2) / Math.cos((Math.PI / sides)))) / (sizeX / 2)) * (1 + (-4 * roofSag / (sizeZ - eaveHeight)) * (((sizeX / 2 * Math.cos((Math.PI / sides)) - overhang + beamWidth / 2) / Math.cos((Math.PI / sides)))) / (sizeX / 2))) - drop - rafterDepth * Math.sqrt(1 + ((sizeZ - eaveHeight) * (1 - (-4 * roofSag / (sizeZ - eaveHeight)) + 2 * (-4 * roofSag / (sizeZ - eaveHeight)) * ((sizeX / 2 * Math.cos((Math.PI / sides)) - overhang + beamWidth / 2) / Math.cos((Math.PI / sides))) / (sizeX / 2)) / (sizeX / 2) / Math.cos((Math.PI / sides))) * ((sizeZ - eaveHeight) * (1 - (-4 * roofSag / (sizeZ - eaveHeight)) + 2 * (-4 * roofSag / (sizeZ - eaveHeight)) * ((sizeX / 2 * Math.cos((Math.PI / sides)) - overhang + beamWidth / 2) / Math.cos((Math.PI / sides))) / (sizeX / 2)) / (sizeX / 2) / Math.cos((Math.PI / sides))))	mm