The pulling-out forces on the upper screws are identical for a top- or bottom-supported shelf bracket.
Take care that an upside-down bracket isn't secured to the shelf in such a way that screws are subject to a force that pulls them axially out of the wood! Drill through and use a nut, bolt and washer if this is the case.
A hint: angle the drill downwards 10 to 15 degrees when making the upper holes in the wall. The screw heads might not fit flush into the bracket, but this arrangement us far, far stronger.
![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png)
timeasmymeasure
no subject
Date: 2009-10-11 09:31 pm (UTC)Take care that an upside-down bracket isn't secured to the shelf in such a way that screws are subject to a force that pulls them axially out of the wood! Drill through and use a nut, bolt and washer if this is the case.
A hint: angle the drill downwards 10 to 15 degrees when making the upper holes in the wall. The screw heads might not fit flush into the bracket, but this arrangement us far, far stronger.