Cantilever beams moments and deflections maximum.
Roof header board.
It resists tears and withstands light foot traffic.
The exterior wall and the headers within will carry all loads from the mid point of the house between the supporting walls to the outside of the house including the roof overhang.
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.
Using 16 nails nail the 2 header boards together from both sides in a grid pattern.
Refer to sfpa s publication southern pine headers beams download in publications that includes all size selection and allowable load tables.
Beams supported at both ends continuous and point loads support loads stress and deflections.
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.
Determine the beam header span length and the span carried supported by the beam header.
Loading conditions are detailed below.
The distance in this case is 12 ft 2 ft 14 ft.
Lay the plywood strips vertically along the face of one header board spaced a few inches apart.
Determine how high it must be to provide an adequate slope to.
A ledger header board is the first step if you are attaching the patio roof to an existing structure.
Click on the appropriate beam this will take you to the calculation table for your project.
The column on the left of each chart labeled beam span represents the beam length with bearing required for your project.
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.
Gentite w59gt10125 10 ft.
Place the second board on the plywood so that the 2 header boards are flush all around.
Fastening to masonry walls.
Typically at least twice the size of surrounding framing members a header is often built up from two studs joists or rafters.
How to attach a header board to a house for a porch roof step 1.
For each application a pdf download is available.
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.
Remove the shingles or siding in the area identified for the header board.
Beams and columns deflection and stress moment of inertia section modulus and technical information of beams and columns.
Board feet chart and calculator board feet volume measurement of lumber.
Also see assumptions for table development.
Black epdm rubber roofing is a weather resistant commercial grade roofing membrane.
Be sure to nail through the plywood strips.
Now the word header refers to a beam like support in wood frame construction.
