Fastening to masonry walls.
Roof header board.
Determine how high it must be to provide an adequate slope to.
Also see assumptions for table development.
Board feet chart and calculator board feet volume measurement of lumber.
Loading conditions are detailed below.
A ledger header board is the first step if you are attaching the patio roof to an existing structure.
Locate a position for a header or ledger board.
Lay the plywood strips vertically along the face of one header board spaced a few inches apart.
The distance in this case is 12 ft 2 ft 14 ft.
Be sure to nail through the plywood strips.
How to attach a header board to a house for a porch roof step 1.
Beams supported at both ends continuous and point loads support loads stress and deflections.
Drill holes for the expanding anchors every 16 inches or as specified by local codes insert the anchors hold the ledger in place and tap it with a hammer to indent the anchor locations on its back face.
Anchor a ledger to a masonry wall with expanding anchor bolts begin by marking a line across the wall for the ledger s top edge.
The header spans an opening for a window or door or it is a cut out in the roof or floor for a skylight chimney or staircase.
Beams and columns deflection and stress moment of inertia section modulus and technical information of beams and columns.
So each lineal foot of wall must carry the loads imposed by a 1 foot wide strip in that 14 ft region.
For each application a pdf download is available.
Click on the appropriate beam this will take you to the calculation table for your project.
Determine the beam header span length and the span carried supported by the beam header.
Refer to sfpa s publication southern pine headers beams download in publications that includes all size selection and allowable load tables.
Take off enough covering to expose.
Gentite w59gt10125 10 ft.
The placement of the ledger header determines the level of the roof so be sure it is positioned at the correct height and is horizontal.
Using 16 nails nail the 2 header boards together from both sides in a grid pattern.
Remove the shingles or siding in the area identified for the header board.
Cantilever beams moments and deflections maximum.
The column on the left of each chart labeled beam span represents the beam length with bearing required for your project.
It resists tears and withstands light foot traffic.
Place the second board on the plywood so that the 2 header boards are flush all around.
Now the word header refers to a beam like support in wood frame construction.
